20807452 has 6 divisors (see below), whose sum is σ = 36413048. Its totient is φ = 10403724.

The previous prime is 20807447. The next prime is 20807483. The reversal of 20807452 is 25470802.

It is a self number, because there is not a number n which added to its sum of digits gives 20807452.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2600928 + ... + 2600935.

Almost surely, 2^20807452 is an apocalyptic number.

It is an amenable number.

20807452 is a deficient number, since it is larger than the sum of its proper divisors (15605596).

20807452 is a wasteful number, since it uses less digits than its factorization.

20807452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5201867 (or 5201865 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 20807452 is about 4561.5186067800. The cubic root of 20807452 is about 275.0466124844.

The spelling of 20807452 in words is "twenty million, eight hundred seven thousand, four hundred fifty-two".