20408552 has 8 divisors (see below), whose sum is σ = 38266050. Its totient is φ = 10204272.

The previous prime is 20408543. The next prime is 20408561. The reversal of 20408552 is 25580402.

It is an interprime number because it is at equal distance from previous prime (20408543) and next prime (20408561).

It can be written as a sum of positive squares in only one way, i.e., 20016676 + 391876 = 4474^2 + 626^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1275527 + ... + 1275542.

Almost surely, 2^20408552 is an apocalyptic number.

It is an amenable number.

20408552 is a deficient number, since it is larger than the sum of its proper divisors (17857498).

20408552 is a wasteful number, since it uses less digits than its factorization.

20408552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2551075 (or 2551071 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 20408552 is about 4517.5825393677. The cubic root of 20408552 is about 273.2776183619.

Adding to 20408552 its reverse (25580402), we get a palindrome (45988954).

The spelling of 20408552 in words is "twenty million, four hundred eight thousand, five hundred fifty-two".