20474630 has 32 divisors (see below), whose sum is σ = 42573600. Its totient is φ = 7006720.

The previous prime is 20474617. The next prime is 20474633. The reversal of 20474630 is 3647402.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20474630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20474633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3605 + ... + 7344.

It is an arithmetic number, because the mean of its divisors is an integer number (1330425).

Almost surely, 2^20474630 is an apocalyptic number.

20474630 is an abundant number, since it is smaller than the sum of its proper divisors (22098970).

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

20474630 is a wasteful number, since it uses less digits than its factorization.

20474630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10984.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 20474630 is about 4524.8900539129. The cubic root of 20474630 is about 273.5722364330.

The spelling of 20474630 in words is "twenty million, four hundred seventy-four thousand, six hundred thirty".