20861452 has 6 divisors (see below), whose sum is σ = 36507548. Its totient is φ = 10430724.

The previous prime is 20861447. The next prime is 20861459. The reversal of 20861452 is 25416802.

It is a self number, because there is not a number n which added to its sum of digits gives 20861452.

It is not an unprimeable number, because it can be changed into a prime (20861459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2607678 + ... + 2607685.

Almost surely, 2^20861452 is an apocalyptic number.

It is an amenable number.

20861452 is a deficient number, since it is larger than the sum of its proper divisors (15646096).

20861452 is a wasteful number, since it uses less digits than its factorization.

20861452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5215367 (or 5215365 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 20861452 is about 4567.4338528325. The cubic root of 20861452 is about 275.2843428102.

The spelling of 20861452 in words is "twenty million, eight hundred sixty-one thousand, four hundred fifty-two".