20831496993432 has 192 divisors, whose sum is σ = 59846039697600. Its totient is φ = 6532026209280.

The previous prime is 20831496993431. The next prime is 20831496993469. The reversal of 20831496993432 is 23439969413802.

20831496993432 is a `hidden beast` number, since 2 + 0 + 83 + 1 + 496 + 9 + 9 + 34 + 32 = 666.

It is a super-2 number, since 2×20831496993432² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20831496993432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20831496993431) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 898323694 + ... + 898346882.

It is an arithmetic number, because the mean of its divisors is an integer number (311698123425).

Almost surely, 2^{20831496993432} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20831496993432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29923019848800).

20831496993432 is an abundant number, since it is smaller than the sum of its proper divisors (39014542704168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20831496993432 is a wasteful number, since it uses less digits than its factorization.

20831496993432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32178 (or 32171 counting only the distinct ones).

The product of its (nonzero) digits is 60466176, while the sum is 63.

The spelling of 20831496993432 in words is "twenty trillion, eight hundred thirty-one billion, four hundred ninety-six million, nine hundred ninety-three thousand, four hundred thirty-two".