2135686920 has 32 divisors (see below), whose sum is σ = 6407061120. Its totient is φ = 569516480.

The previous prime is 2135686913. The next prime is 2135686939. The reversal of 2135686920 is 296865312.

It is a super-2 number, since 2×2135686920² = 9122317240518172800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8898576 + ... + 8898815.

It is an arithmetic number, because the mean of its divisors is an integer number (200220660).

Almost surely, 2^2135686920 is an apocalyptic number.

2135686920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2135686920 is an abundant number, since it is smaller than the sum of its proper divisors (4271374200).

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

2135686920 is a wasteful number, since it uses less digits than its factorization.

2135686920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17797405 (or 17797401 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 2135686920 is about 46213.4928348854. The cubic root of 2135686920 is about 1287.7924144320.

The spelling of 2135686920 in words is "two billion, one hundred thirty-five million, six hundred eighty-six thousand, nine hundred twenty".