11421920 has 24 divisors (see below), whose sum is σ = 26984664. Its totient is φ = 4568704.

The previous prime is 11421913. The next prime is 11421947. The reversal of 11421920 is 2912411.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 11421892 and 11421901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35534 + ... + 35853.

It is an arithmetic number, because the mean of its divisors is an integer number (1124361).

Almost surely, 2^11421920 is an apocalyptic number.

11421920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11421920 is an abundant number, since it is smaller than the sum of its proper divisors (15562744).

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

11421920 is an equidigital number, since it uses as much as digits as its factorization.

11421920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71402 (or 71394 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 11421920 is about 3379.6331161829. The cubic root of 11421920 is about 225.2058691907.

The spelling of 11421920 in words is "eleven million, four hundred twenty-one thousand, nine hundred twenty".