20415552 has 28 divisors (see below), whose sum is σ = 54016656. Its totient is φ = 6805120.

The previous prime is 20415529. The next prime is 20415599. The reversal of 20415552 is 25551402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52974 + ... + 53357.

Almost surely, 2^20415552 is an apocalyptic number.

It is an amenable number.

20415552 is an abundant number, since it is smaller than the sum of its proper divisors (33601104).

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

20415552 is a wasteful number, since it uses less digits than its factorization.

20415552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106346 (or 106336 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 20415552 is about 4518.3572235935. The cubic root of 20415552 is about 273.3088589363.

Adding to 20415552 its reverse (25551402), we get a palindrome (45966954).

The spelling of 20415552 in words is "twenty million, four hundred fifteen thousand, five hundred fifty-two".