21497002702 has 32 divisors (see below), whose sum is σ = 37633766400. Its totient is φ = 9018871008.

The previous prime is 21497002691. The next prime is 21497002717. The reversal of 21497002702 is 20720079412.

It is a happy number.

It is a super-2 number, since 2×21497002702² (a number of 21 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, 142968 + ... + 251860.

It is an arithmetic number, because the mean of its divisors is an integer number (1176055200).

Almost surely, 2^21497002702 is an apocalyptic number.

21497002702 is a deficient number, since it is larger than the sum of its proper divisors (16136763698).

21497002702 is a wasteful number, since it uses less digits than its factorization.

21497002702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109200.

The product of its (nonzero) digits is 14112, while the sum is 34.

The spelling of 21497002702 in words is "twenty-one billion, four hundred ninety-seven million, two thousand, seven hundred two".