2157867934 has 4 divisors (see below), whose sum is σ = 3236801904. Its totient is φ = 1078933966.

The previous prime is 2157867911. The next prime is 2157867973. The reversal of 2157867934 is 4397687512.

2157867934 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539466982 + ... + 539466985.

It is an arithmetic number, because the mean of its divisors is an integer number (809200476).

Almost surely, 2^2157867934 is an apocalyptic number.

2157867934 is a deficient number, since it is larger than the sum of its proper divisors (1078933970).

2157867934 is a wasteful number, since it uses less digits than its factorization.

2157867934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078933969.

The product of its digits is 2540160, while the sum is 52.

The square root of 2157867934 is about 46452.8571134220. The cubic root of 2157867934 is about 1292.2353594717.

The spelling of 2157867934 in words is "two billion, one hundred fifty-seven million, eight hundred sixty-seven thousand, nine hundred thirty-four".