20207131340 has 24 divisors (see below), whose sum is σ = 46292701392. Its totient is φ = 7348047680.

The previous prime is 20207131331. The next prime is 20207131393. The reversal of 20207131340 is 4313170202.

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, 45925079 + ... + 45925518.

It is an arithmetic number, because the mean of its divisors is an integer number (1928862558).

Almost surely, 2^20207131340 is an apocalyptic number.

20207131340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20207131340 is an abundant number, since it is smaller than the sum of its proper divisors (26085570052).

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

20207131340 is a wasteful number, since it uses less digits than its factorization.

20207131340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91850617 (or 91850615 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The spelling of 20207131340 in words is "twenty billion, two hundred seven million, one hundred thirty-one thousand, three hundred forty".