2157417200420 has 12 divisors (see below), whose sum is σ = 4530576120924. Its totient is φ = 862966880160.

The previous prime is 2157417200399. The next prime is 2157417200453. The reversal of 2157417200420 is 240027147512.

It can be written as a sum of positive squares in 2 ways, for example, as 1213923575524 + 943493624896 = 1101782^2 + 971336^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53935429991 + ... + 53935430030.

It is an arithmetic number, because the mean of its divisors is an integer number (377548010077).

Almost surely, 2^{2157417200420} is an apocalyptic number.

2157417200420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2157417200420 is an abundant number, since it is smaller than the sum of its proper divisors (2373158920504).

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

2157417200420 is a wasteful number, since it uses less digits than its factorization.

2157417200420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107870860030 (or 107870860028 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 35.

The spelling of 2157417200420 in words is "two trillion, one hundred fifty-seven billion, four hundred seventeen million, two hundred thousand, four hundred twenty".