21536072757770 has 16 divisors (see below), whose sum is σ = 38981494827360. Its totient is φ = 8566303800144.

The previous prime is 21536072757763. The next prime is 21536072757799. The reversal of 21536072757770 is 7775727063512.

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, 6015660992 + ... + 6015664571.

It is an arithmetic number, because the mean of its divisors is an integer number (2436343426710).

Almost surely, 2^{21536072757770} is an apocalyptic number.

21536072757770 is a deficient number, since it is larger than the sum of its proper divisors (17445422069590).

21536072757770 is a wasteful number, since it uses less digits than its factorization.

21536072757770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12031325749.

The product of its (nonzero) digits is 30252600, while the sum is 59.

The spelling of 21536072757770 in words is "twenty-one trillion, five hundred thirty-six billion, seventy-two million, seven hundred fifty-seven thousand, seven hundred seventy".