20626845 has 16 divisors (see below), whose sum is σ = 33545472. Its totient is φ = 10820160.

The previous prime is 20626841. The next prime is 20626847. The reversal of 20626845 is 54862602.

It is not a de Polignac number, because 20626845 - 2² = 20626841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20626841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10357 + ... + 12186.

It is an arithmetic number, because the mean of its divisors is an integer number (2096592).

Almost surely, 2^20626845 is an apocalyptic number.

It is an amenable number.

20626845 is a deficient number, since it is larger than the sum of its proper divisors (12918627).

20626845 is a wasteful number, since it uses less digits than its factorization.

20626845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22612.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 20626845 is about 4541.6786544184. The cubic root of 20626845 is about 274.2485047258.

The spelling of 20626845 in words is "twenty million, six hundred twenty-six thousand, eight hundred forty-five".