21401540555202 has 48 divisors (see below), whose sum is σ = 49257579282912. Its totient is φ = 6692338385280.

The previous prime is 21401540555183. The next prime is 21401540555209. The reversal of 21401540555202 is 20255504510412.

21401540555202 is a `hidden beast` number, since 2 + 1 + 40 + 1 + 5 + 40 + 55 + 520 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (21401540555209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113814324 + ... + 114002207.

It is an arithmetic number, because the mean of its divisors is an integer number (1026199568394).

Almost surely, 2^{21401540555202} is an apocalyptic number.

21401540555202 is an abundant number, since it is smaller than the sum of its proper divisors (27856038727710).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21401540555202 is a wasteful number, since it uses less digits than its factorization.

21401540555202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227816863 (or 227816860 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 36.

The spelling of 21401540555202 in words is "twenty-one trillion, four hundred one billion, five hundred forty million, five hundred fifty-five thousand, two hundred two".