20155552 has 12 divisors (see below), whose sum is σ = 39681306. Its totient is φ = 10077760.

The previous prime is 20155547. The next prime is 20155571. The reversal of 20155552 is 25555102.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18627856 + 1527696 = 4316^2 + 1236^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314899 + ... + 314962.

Almost surely, 2^20155552 is an apocalyptic number.

It is an amenable number.

20155552 is a deficient number, since it is larger than the sum of its proper divisors (19525754).

20155552 is an equidigital number, since it uses as much as digits as its factorization.

20155552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629871 (or 629863 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 20155552 is about 4489.4935126359. The cubic root of 20155552 is about 272.1436668949.

The spelling of 20155552 in words is "twenty million, one hundred fifty-five thousand, five hundred fifty-two".