20491052 has 24 divisors (see below), whose sum is σ = 39281760. Its totient is φ = 9309440.

The previous prime is 20491049. The next prime is 20491057. The reversal of 20491052 is 25019402.

It is not an unprimeable number, because it can be changed into a prime (20491057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3224 + ... + 7167.

It is an arithmetic number, because the mean of its divisors is an integer number (1636740).

Almost surely, 2^20491052 is an apocalyptic number.

It is an amenable number.

20491052 is a deficient number, since it is larger than the sum of its proper divisors (18790708).

20491052 is a wasteful number, since it uses less digits than its factorization.

20491052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10441 (or 10439 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 20491052 is about 4526.7043199219. The cubic root of 20491052 is about 273.6453578632.

The spelling of 20491052 in words is "twenty million, four hundred ninety-one thousand, fifty-two".