21932173500 has 96 divisors (see below), whose sum is σ = 64141616448. Its totient is φ = 5823385600.

The previous prime is 21932173493. The next prime is 21932173541. The reversal of 21932173500 is 537123912.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 318124 + ... + 380876.

It is an arithmetic number, because the mean of its divisors is an integer number (668141838).

Almost surely, 2^21932173500 is an apocalyptic number.

21932173500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21932173500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32070808224).

21932173500 is an abundant number, since it is smaller than the sum of its proper divisors (42209442948).

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

21932173500 is a wasteful number, since it uses less digits than its factorization.

21932173500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63008 (or 62996 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 33.

The spelling of 21932173500 in words is "twenty-one billion, nine hundred thirty-two million, one hundred seventy-three thousand, five hundred".