20626404 has 12 divisors (see below), whose sum is σ = 48128304. Its totient is φ = 6875464.

The previous prime is 20626399. The next prime is 20626429. The reversal of 20626404 is 40462602.

It is a tau number, because it is divible by the number of its divisors (12).

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, 859422 + ... + 859445.

It is an arithmetic number, because the mean of its divisors is an integer number (4010692).

Almost surely, 2^20626404 is an apocalyptic number.

It is an amenable number.

20626404 is an abundant number, since it is smaller than the sum of its proper divisors (27501900).

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

20626404 is a wasteful number, since it uses less digits than its factorization.

20626404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718874 (or 1718872 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 20626404 is about 4541.6301038284. The cubic root of 20626404 is about 274.2465502428.

The spelling of 20626404 in words is "twenty million, six hundred twenty-six thousand, four hundred four".