920138349087 has 24 divisors (see below), whose sum is σ = 1352663374608. Its totient is φ = 602611920000.

The previous prime is 920138349079. The next prime is 920138349103. The reversal of 920138349087 is 780943831029.

920138349087 is a `hidden beast` number, since 92 + 0 + 138 + 349 + 0 + 87 = 666.

It is not a de Polignac number, because 920138349087 - 2³ = 920138349079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920138349187) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2624964 + ... + 2954777.

It is an arithmetic number, because the mean of its divisors is an integer number (56360973942).

Almost surely, 2^920138349087 is an apocalyptic number.

920138349087 is a deficient number, since it is larger than the sum of its proper divisors (432525025521).

920138349087 is a wasteful number, since it uses less digits than its factorization.

920138349087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5580071 (or 5580068 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 920138349087 in words is "nine hundred twenty billion, one hundred thirty-eight million, three hundred forty-nine thousand, eighty-seven".