20623470 has 32 divisors (see below), whose sum is σ = 56567808. Its totient is φ = 4713888.

The previous prime is 20623469. The next prime is 20623483. The reversal of 20623470 is 7432602.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20623470.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48894 + ... + 49313.

It is an arithmetic number, because the mean of its divisors is an integer number (1767744).

Almost surely, 2^20623470 is an apocalyptic number.

20623470 is an abundant number, since it is smaller than the sum of its proper divisors (35944338).

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

20623470 is a wasteful number, since it uses less digits than its factorization.

20623470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98224.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 20623470 is about 4541.3070805661. The cubic root of 20623470 is about 274.2335462386.

The spelling of 20623470 in words is "twenty million, six hundred twenty-three thousand, four hundred seventy".