21346365500 has 24 divisors (see below), whose sum is σ = 46620463344. Its totient is φ = 8538546000.

The previous prime is 21346365497. The next prime is 21346365511. The reversal of 21346365500 is 556364312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21345866 + ... + 21346865.

It is an arithmetic number, because the mean of its divisors is an integer number (1942519306).

Almost surely, 2^21346365500 is an apocalyptic number.

21346365500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21346365500 is an abundant number, since it is smaller than the sum of its proper divisors (25274097844).

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

21346365500 is a wasteful number, since it uses less digits than its factorization.

21346365500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42692750 (or 42692738 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 35.

The spelling of 21346365500 in words is "twenty-one billion, three hundred forty-six million, three hundred sixty-five thousand, five hundred".