11903123640 has 32 divisors (see below), whose sum is σ = 35709371280. Its totient is φ = 3174166272.

The previous prime is 11903123581. The next prime is 11903123663. The reversal of 11903123640 is 4632130911.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 11903123598 and 11903123607.

It is a congruent number.

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, 49596229 + ... + 49596468.

Almost surely, 2^11903123640 is an apocalyptic number.

11903123640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11903123640 is an abundant number, since it is smaller than the sum of its proper divisors (23806247640).

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

11903123640 is a wasteful number, since it uses less digits than its factorization.

11903123640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99192711 (or 99192707 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The spelling of 11903123640 in words is "eleven billion, nine hundred three million, one hundred twenty-three thousand, six hundred forty".