2156042620 has 12 divisors (see below), whose sum is σ = 4527689544. Its totient is φ = 862417040.

The previous prime is 2156042593. The next prime is 2156042627. The reversal of 2156042620 is 262406512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156042627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53901046 + ... + 53901085.

It is an arithmetic number, because the mean of its divisors is an integer number (377307462).

Almost surely, 2^2156042620 is an apocalyptic number.

2156042620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2156042620 is an abundant number, since it is smaller than the sum of its proper divisors (2371646924).

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

2156042620 is a wasteful number, since it uses less digits than its factorization.

2156042620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107802140 (or 107802138 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 2156042620 is about 46433.2060060470. The cubic root of 2156042620 is about 1291.8708946770.

The spelling of 2156042620 in words is "two billion, one hundred fifty-six million, forty-two thousand, six hundred twenty".