20422460 has 12 divisors (see below), whose sum is σ = 42887208. Its totient is φ = 8168976.

The previous prime is 20422447. The next prime is 20422499. The reversal of 20422460 is 6422402.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1021123 = 20422460 / (2 + 0 + 4 + 2 + 2 + 4 + 6 + 0).

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, 510542 + ... + 510581.

It is an arithmetic number, because the mean of its divisors is an integer number (3573934).

Almost surely, 2^20422460 is an apocalyptic number.

20422460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20422460 is an abundant number, since it is smaller than the sum of its proper divisors (22464748).

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

20422460 is a wasteful number, since it uses less digits than its factorization.

20422460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021132 (or 1021130 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 20422460 is about 4519.1215960627. The cubic root of 20422460 is about 273.3396819201.

Adding to 20422460 its reverse (6422402), we get a palindrome (26844862).

The spelling of 20422460 in words is "twenty million, four hundred twenty-two thousand, four hundred sixty".