20859124692 has 96 divisors (see below), whose sum is σ = 58655994880. Its totient is φ = 5636044800.

The previous prime is 20859124691. The next prime is 20859124709. The reversal of 20859124692 is 29642195802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20859124691) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 909567 + ... + 932217.

Almost surely, 2^20859124692 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 20859124692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29327997440).

20859124692 is an abundant number, since it is smaller than the sum of its proper divisors (37796870188).

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

20859124692 is a wasteful number, since it uses less digits than its factorization.

20859124692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23261 (or 23259 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 20859124692 in words is "twenty billion, eight hundred fifty-nine million, one hundred twenty-four thousand, six hundred ninety-two".