20626955 has 12 divisors (see below), whose sum is σ = 25154640. Its totient is φ = 16237584.

The previous prime is 20626943. The next prime is 20626961. The reversal of 20626955 is 55962602.

It is not a de Polignac number, because 20626955 - 2²² = 16432651 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21986 + ... + 22904.

It is an arithmetic number, because the mean of its divisors is an integer number (2096220).

Almost surely, 2^20626955 is an apocalyptic number.

20626955 is a deficient number, since it is larger than the sum of its proper divisors (4527685).

20626955 is an frugal number, since it uses more digits than its factorization.

20626955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058 (or 991 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 20626955 is about 4541.6907644621. The cubic root of 20626955 is about 274.2489922342.

The spelling of 20626955 in words is "twenty million, six hundred twenty-six thousand, nine hundred fifty-five".