2159690420 has 24 divisors (see below), whose sum is σ = 4631848704. Its totient is φ = 845495456.

The previous prime is 2159690417. The next prime is 2159690431. The reversal of 2159690420 is 240969512.

It is a congruent number.

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, 1147832 + ... + 1149711.

It is an arithmetic number, because the mean of its divisors is an integer number (192993696).

Almost surely, 2^2159690420 is an apocalyptic number.

2159690420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2159690420 is an abundant number, since it is smaller than the sum of its proper divisors (2472158284).

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

2159690420 is a wasteful number, since it uses less digits than its factorization.

2159690420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2297599 (or 2297597 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 2159690420 is about 46472.4694846314. The cubic root of 2159690420 is about 1292.5990545971.

The spelling of 2159690420 in words is "two billion, one hundred fifty-nine million, six hundred ninety thousand, four hundred twenty".