21602731430 has 48 divisors (see below), whose sum is σ = 45681435216. Its totient is φ = 7333300800.

The previous prime is 21602731421. The next prime is 21602731477. The reversal of 21602731430 is 3413720612.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21602731393 and 21602731402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 168764 + ... + 267743.

It is an arithmetic number, because the mean of its divisors is an integer number (951696567).

Almost surely, 2^21602731430 is an apocalyptic number.

21602731430 is an abundant number, since it is smaller than the sum of its proper divisors (24078703786).

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

21602731430 is a wasteful number, since it uses less digits than its factorization.

21602731430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436629 (or 436622 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The spelling of 21602731430 in words is "twenty-one billion, six hundred two million, seven hundred thirty-one thousand, four hundred thirty".