20724836231 has 8 divisors (see below), whose sum is σ = 22610872704. Its totient is φ = 18839126520.

The previous prime is 20724836219. The next prime is 20724836239. The reversal of 20724836231 is 13263842702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20724836231 is a prime.

It is a super-2 number, since 2×20724836231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20724836239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61916 + ... + 212798.

It is an arithmetic number, because the mean of its divisors is an integer number (2826359088).

Almost surely, 2^20724836231 is an apocalyptic number.

20724836231 is a deficient number, since it is larger than the sum of its proper divisors (1886036473).

20724836231 is a wasteful number, since it uses less digits than its factorization.

20724836231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163381.

The product of its (nonzero) digits is 96768, while the sum is 38.

The spelling of 20724836231 in words is "twenty billion, seven hundred twenty-four million, eight hundred thirty-six thousand, two hundred thirty-one".