20623550 has 48 divisors (see below), whose sum is σ = 42787440. Its totient is φ = 7349760.

The previous prime is 20623513. The next prime is 20623573. The reversal of 20623550 is 5532602.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15512 + ... + 16788.

It is an arithmetic number, because the mean of its divisors is an integer number (891405).

Almost surely, 2^20623550 is an apocalyptic number.

20623550 is an abundant number, since it is smaller than the sum of its proper divisors (22163890).

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

20623550 is a wasteful number, since it uses less digits than its factorization.

20623550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325 (or 1320 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 20623550 is about 4541.3158885944. The cubic root of 20623550 is about 274.2339008290.

The spelling of 20623550 in words is "twenty million, six hundred twenty-three thousand, five hundred fifty".