21602754212 has 36 divisors (see below), whose sum is σ = 41053001220. Its totient is φ = 9942147072.

The previous prime is 21602754203. The next prime is 21602754221. The reversal of 21602754212 is 21245720612.

It is an interprime number because it is at equal distance from previous prime (21602754203) and next prime (21602754221).

It can be written as a sum of positive squares in 6 ways, for example, as 317694976 + 21285059236 = 17824^2 + 145894^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 193364 + ... + 283892.

It is an arithmetic number, because the mean of its divisors is an integer number (1140361145).

Almost surely, 2^21602754212 is an apocalyptic number.

It is an amenable number.

21602754212 is a deficient number, since it is larger than the sum of its proper divisors (19450247008).

21602754212 is a wasteful number, since it uses less digits than its factorization.

21602754212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90912 (or 90897 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The spelling of 21602754212 in words is "twenty-one billion, six hundred two million, seven hundred fifty-four thousand, two hundred twelve".