21533423055502 has 16 divisors (see below), whose sum is σ = 32699130952320. Its totient is φ = 10633790818552.

The previous prime is 21533423055479. The next prime is 21533423055541. The reversal of 21533423055502 is 20555032433512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18966802 + ... + 20070037.

It is an arithmetic number, because the mean of its divisors is an integer number (2043695684520).

Almost surely, 2^{21533423055502} is an apocalyptic number.

21533423055502 is a deficient number, since it is larger than the sum of its proper divisors (11165707896818).

21533423055502 is a wasteful number, since it uses less digits than its factorization.

21533423055502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39040247.

The product of its (nonzero) digits is 540000, while the sum is 40.

The spelling of 21533423055502 in words is "twenty-one trillion, five hundred thirty-three billion, four hundred twenty-three million, fifty-five thousand, five hundred two".