21630223000402 has 4 divisors (see below), whose sum is σ = 32445334500606. Its totient is φ = 10815111500200.

The previous prime is 21630223000391. The next prime is 21630223000483. The reversal of 21630223000402 is 20400032203612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20862796191561 + 767426808841 = 4567581^2 + 876029^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5407555750099 + ... + 5407555750102.

Almost surely, 2^{21630223000402} is an apocalyptic number.

21630223000402 is a deficient number, since it is larger than the sum of its proper divisors (10815111500204).

21630223000402 is a wasteful number, since it uses less digits than its factorization.

21630223000402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10815111500203.

The product of its (nonzero) digits is 3456, while the sum is 25.

The spelling of 21630223000402 in words is "twenty-one trillion, six hundred thirty billion, two hundred twenty-three million, four hundred two", and thus it is an aban number.