21620546204204 has 6 divisors (see below), whose sum is σ = 37835955857364. Its totient is φ = 10810273102100.

The previous prime is 21620546204183. The next prime is 21620546204219. The reversal of 21620546204204 is 40240264502612.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2702568275522 + ... + 2702568275529.

It is an arithmetic number, because the mean of its divisors is an integer number (6305992642894).

Almost surely, 2^{21620546204204} is an apocalyptic number.

It is an amenable number.

21620546204204 is a deficient number, since it is larger than the sum of its proper divisors (16215409653160).

21620546204204 is a wasteful number, since it uses less digits than its factorization.

21620546204204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5405136551055 (or 5405136551053 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 38.

The spelling of 21620546204204 in words is "twenty-one trillion, six hundred twenty billion, five hundred forty-six million, two hundred four thousand, two hundred four".