21354669500 has 48 divisors (see below), whose sum is σ = 46979176608. Its totient is φ = 8479491200.

The previous prime is 21354669463. The next prime is 21354669541. The reversal of 21354669500 is 596645312.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

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, 87374 + ... + 224373.

It is an arithmetic number, because the mean of its divisors is an integer number (978732846).

Almost surely, 2^21354669500 is an apocalyptic number.

21354669500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21354669500 is an abundant number, since it is smaller than the sum of its proper divisors (25624507108).

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

21354669500 is a wasteful number, since it uses less digits than its factorization.

21354669500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311903 (or 311891 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 21354669500 in words is "twenty-one billion, three hundred fifty-four million, six hundred sixty-nine thousand, five hundred".