20892392856 has 160 divisors (see below), whose sum is σ = 62177544000. Its totient is φ = 6535525824.

The previous prime is 20892392849. The next prime is 20892392863. The reversal of 20892392856 is 65829329802.

It is an interprime number because it is at equal distance from previous prime (20892392849) and next prime (20892392863).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1309455 + ... + 1325313.

It is an arithmetic number, because the mean of its divisors is an integer number (388609650).

Almost surely, 2^20892392856 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 20892392856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31088772000).

20892392856 is an abundant number, since it is smaller than the sum of its proper divisors (41285151144).

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

20892392856 is a wasteful number, since it uses less digits than its factorization.

20892392856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16003 (or 15990 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 20892392856 in words is "twenty billion, eight hundred ninety-two million, three hundred ninety-two thousand, eight hundred fifty-six".