20626554 has 16 divisors (see below), whose sum is σ = 44426592. Its totient is φ = 6346608.

The previous prime is 20626547. The next prime is 20626589. The reversal of 20626554 is 45562602.

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, 132144 + ... + 132299.

It is an arithmetic number, because the mean of its divisors is an integer number (2776662).

Almost surely, 2^20626554 is an apocalyptic number.

20626554 is an abundant number, since it is smaller than the sum of its proper divisors (23800038).

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

20626554 is a wasteful number, since it uses less digits than its factorization.

20626554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264461.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 20626554 is about 4541.6466176928. The cubic root of 20626554 is about 274.2472150360.

The spelling of 20626554 in words is "twenty million, six hundred twenty-six thousand, five hundred fifty-four".