20629668 has 24 divisors (see below), whose sum is σ = 50669920. Its totient is φ = 6514560.

The previous prime is 20629657. The next prime is 20629691. The reversal of 20629668 is 86692602.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45013 + ... + 45468.

Almost surely, 2^20629668 is an apocalyptic number.

It is an amenable number.

20629668 is an abundant number, since it is smaller than the sum of its proper divisors (30040252).

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

20629668 is a wasteful number, since it uses less digits than its factorization.

20629668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90507 (or 90505 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 20629668 is about 4541.9894319560. The cubic root of 20629668 is about 274.2610154161.

The spelling of 20629668 in words is "twenty million, six hundred twenty-nine thousand, six hundred sixty-eight".