135987020920 has 64 divisors (see below), whose sum is σ = 307127700000. Its totient is φ = 54189539328.

The previous prime is 135987020903. The next prime is 135987020941. The reversal of 135987020920 is 29020789531.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11830536 + ... + 11842024.

Almost surely, 2^135987020920 is an apocalyptic number.

135987020920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135987020920 is an abundant number, since it is smaller than the sum of its proper divisors (171140679080).

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

135987020920 is a wasteful number, since it uses less digits than its factorization.

135987020920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12592 (or 12588 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 135987020920 in words is "one hundred thirty-five billion, nine hundred eighty-seven million, twenty thousand, nine hundred twenty".