22712420 has 24 divisors (see below), whose sum is σ = 47995584. Its totient is φ = 9027936.

The previous prime is 22712419. The next prime is 22712441. The reversal of 22712420 is 2421722.

It is a happy number.

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 = 22712392 and 22712401.

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, 224 + ... + 6743.

It is an arithmetic number, because the mean of its divisors is an integer number (1999816).

Almost surely, 2^22712420 is an apocalyptic number.

22712420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22712420 is an abundant number, since it is smaller than the sum of its proper divisors (25283164).

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

22712420 is a wasteful number, since it uses less digits than its factorization.

22712420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7139 (or 7137 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 22712420 is about 4765.7549244585. The cubic root of 22712420 is about 283.1964490655.

It can be divided in two parts, 22712 and 420, that added together give a palindrome (23132).

The spelling of 22712420 in words is "twenty-two million, seven hundred twelve thousand, four hundred twenty".