20497834331064 has 24 divisors (see below), whose sum is σ = 55514967980160. Its totient is φ = 6832611443664.

The previous prime is 20497834331059. The next prime is 20497834331081. The reversal of 20497834331064 is 46013343879402.

It is a happy number.

20497834331064 is a `hidden beast` number, since 2 + 0 + 497 + 8 + 3 + 43 + 3 + 106 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×20497834331064² (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 20497834331064.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 142346071672 + ... + 142346071815.

It is an arithmetic number, because the mean of its divisors is an integer number (2313123665840).

Almost surely, 2^{20497834331064} is an apocalyptic number.

20497834331064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20497834331064 is an abundant number, since it is smaller than the sum of its proper divisors (35017133649096).

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

20497834331064 is a wasteful number, since it uses less digits than its factorization.

20497834331064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284692143499 (or 284692143492 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 54.

The spelling of 20497834331064 in words is "twenty trillion, four hundred ninety-seven billion, eight hundred thirty-four million, three hundred thirty-one thousand, sixty-four".