89923921820 has 48 divisors (see below), whose sum is σ = 199975583808. Its totient is φ = 33849123840.

The previous prime is 89923921817. The next prime is 89923921853. The reversal of 89923921820 is 2812932998.

It is a super-2 number, since 2×89923921820² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3520214 + ... + 3545666.

It is an arithmetic number, because the mean of its divisors is an integer number (4166157996).

Almost surely, 2^89923921820 is an apocalyptic number.

It is an amenable number.

89923921820 is an abundant number, since it is smaller than the sum of its proper divisors (110051661988).

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

89923921820 is a wasteful number, since it uses less digits than its factorization.

89923921820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35870 (or 35868 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 53.

The spelling of 89923921820 in words is "eighty-nine billion, nine hundred twenty-three million, nine hundred twenty-one thousand, eight hundred twenty".