20249451 has 12 divisors (see below), whose sum is σ = 29320200. Its totient is φ = 13466880.

The previous prime is 20249443. The next prime is 20249501. The reversal of 20249451 is 15494202.

20249451 is a `hidden beast` number, since 202 + 4 + 9 + 451 = 666.

It is not a de Polignac number, because 20249451 - 2³ = 20249443 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20249441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1536 + ... + 6546.

It is an arithmetic number, because the mean of its divisors is an integer number (2443350).

Almost surely, 2^20249451 is an apocalyptic number.

20249451 is a deficient number, since it is larger than the sum of its proper divisors (9070749).

20249451 is a wasteful number, since it uses less digits than its factorization.

20249451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5466 (or 5463 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 20249451 is about 4499.9389995865. The cubic root of 20249451 is about 272.5656256946.

The spelling of 20249451 in words is "twenty million, two hundred forty-nine thousand, four hundred fifty-one".