11391405020 has 12 divisors (see below), whose sum is σ = 23921950584. Its totient is φ = 4556562000.

The previous prime is 11391405019. The next prime is 11391405029. The reversal of 11391405020 is 2050419311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11391405029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284785106 + ... + 284785145.

It is an arithmetic number, because the mean of its divisors is an integer number (1993495882).

Almost surely, 2^11391405020 is an apocalyptic number.

11391405020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11391405020 is an abundant number, since it is smaller than the sum of its proper divisors (12530545564).

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

11391405020 is a wasteful number, since it uses less digits than its factorization.

11391405020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569570260 (or 569570258 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The spelling of 11391405020 in words is "eleven billion, three hundred ninety-one million, four hundred five thousand, twenty".