20626629 has 4 divisors (see below), whose sum is σ = 27502176. Its totient is φ = 13751084.

The previous prime is 20626621. The next prime is 20626633. The reversal of 20626629 is 92662602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20626629 - 2³ = 20626621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20626629.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20626621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3437769 + ... + 3437774.

It is an arithmetic number, because the mean of its divisors is an integer number (6875544).

Almost surely, 2^20626629 is an apocalyptic number.

It is an amenable number.

20626629 is a deficient number, since it is larger than the sum of its proper divisors (6875547).

20626629 is an equidigital number, since it uses as much as digits as its factorization.

20626629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6875546.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 20626629 is about 4541.6548746024. The cubic root of 20626629 is about 274.2475474315.

The spelling of 20626629 in words is "twenty million, six hundred twenty-six thousand, six hundred twenty-nine".