11931420400 has 30 divisors (see below), whose sum is σ = 28665238472. Its totient is φ = 4772568000.

The previous prime is 11931420359. The next prime is 11931420419. The reversal of 11931420400 is 402413911.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14913876 + ... + 14914675.

Almost surely, 2^11931420400 is an apocalyptic number.

11931420400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11931420400 is an abundant number, since it is smaller than the sum of its proper divisors (16733818072).

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

11931420400 is a wasteful number, since it uses less digits than its factorization.

11931420400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29828569 (or 29828558 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 11931420400 in words is "eleven billion, nine hundred thirty-one million, four hundred twenty thousand, four hundred".