21365653202 has 16 divisors (see below), whose sum is σ = 33067802880. Its totient is φ = 10347739008.

The previous prime is 21365653163. The next prime is 21365653237. The reversal of 21365653202 is 20235656312.

It is a super-2 number, since 2×21365653202² (a number of 21 digits) contains 22 as substring.

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, 1162502 + ... + 1180737.

It is an arithmetic number, because the mean of its divisors is an integer number (2066737680).

Almost surely, 2^21365653202 is an apocalyptic number.

21365653202 is a deficient number, since it is larger than the sum of its proper divisors (11702149678).

21365653202 is a wasteful number, since it uses less digits than its factorization.

21365653202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2343385.

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

The spelling of 21365653202 in words is "twenty-one billion, three hundred sixty-five million, six hundred fifty-three thousand, two hundred two".