20376878613 has 32 divisors (see below), whose sum is σ = 34342753536. Its totient is φ = 10457745408.

The previous prime is 20376878609. The next prime is 20376878617. The reversal of 20376878613 is 31687867302.

It is an interprime number because it is at equal distance from previous prime (20376878609) and next prime (20376878617).

It is not a de Polignac number, because 20376878613 - 2² = 20376878609 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20376878617) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 998556 + ... + 1018757.

It is an arithmetic number, because the mean of its divisors is an integer number (1073211048).

Almost surely, 2^20376878613 is an apocalyptic number.

It is an amenable number.

20376878613 is a deficient number, since it is larger than the sum of its proper divisors (13965874923).

20376878613 is a wasteful number, since it uses less digits than its factorization.

20376878613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2017373.

The product of its (nonzero) digits is 2032128, while the sum is 51.

The spelling of 20376878613 in words is "twenty billion, three hundred seventy-six million, eight hundred seventy-eight thousand, six hundred thirteen".