20407152 has 20 divisors (see below), whose sum is σ = 52718600. Its totient is φ = 6802368.

The previous prime is 20407129. The next prime is 20407181. The reversal of 20407152 is 25170402.

It is a super-2 number, since 2×20407152² = 832903705502208, which contains 22 as substring.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 212527 + ... + 212622.

It is an arithmetic number, because the mean of its divisors is an integer number (2635930).

Almost surely, 2^20407152 is an apocalyptic number.

It is an amenable number.

20407152 is an abundant number, since it is smaller than the sum of its proper divisors (32311448).

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

20407152 is a wasteful number, since it uses less digits than its factorization.

20407152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425160 (or 425154 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 20407152 is about 4517.4275865807. The cubic root of 20407152 is about 273.2713693898.

Adding to 20407152 its reverse (25170402), we get a palindrome (45577554).

The spelling of 20407152 in words is "twenty million, four hundred seven thousand, one hundred fifty-two".