21602532454402 has 4 divisors (see below), whose sum is σ = 32403798681606. Its totient is φ = 10801266227200.

The previous prime is 21602532454381. The next prime is 21602532454457. The reversal of 21602532454402 is 20445423520612.

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., 20995814530161 + 606717924241 = 4582119^2 + 778921^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5400633113599 + ... + 5400633113602.

Almost surely, 2^{21602532454402} is an apocalyptic number.

21602532454402 is a deficient number, since it is larger than the sum of its proper divisors (10801266227204).

21602532454402 is a wasteful number, since it uses less digits than its factorization.

21602532454402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10801266227203.

The product of its (nonzero) digits is 460800, while the sum is 40.

The spelling of 21602532454402 in words is "twenty-one trillion, six hundred two billion, five hundred thirty-two million, four hundred fifty-four thousand, four hundred two".