2142945920 has 32 divisors (see below), whose sum is σ = 5122981620. Its totient is φ = 857178112.

The previous prime is 2142945919. The next prime is 2142945943. The reversal of 2142945920 is 295492412.

It can be written as a sum of positive squares in 2 ways, for example, as 1938112576 + 204833344 = 44024^2 + 14312^2 .

It is a tau number, because it is divible by the number of its divisors (32).

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, 1673537 + ... + 1674816.

Almost surely, 2^2142945920 is an apocalyptic number.

2142945920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2142945920 is an abundant number, since it is smaller than the sum of its proper divisors (2980035700).

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

2142945920 is an equidigital number, since it uses as much as digits as its factorization.

2142945920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3348372 (or 3348360 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 2142945920 is about 46291.9638814341. The cubic root of 2142945920 is about 1289.2497931507.

The spelling of 2142945920 in words is "two billion, one hundred forty-two million, nine hundred forty-five thousand, nine hundred twenty".