20513876 has 24 divisors (see below), whose sum is σ = 36699264. Its totient is φ = 10031040.

The previous prime is 20513839. The next prime is 20513879. The reversal of 20513876 is 67831502.

It is a happy number.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20513879) 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, 47381 + ... + 47811.

It is an arithmetic number, because the mean of its divisors is an integer number (1529136).

Almost surely, 2^20513876 is an apocalyptic number.

It is an amenable number.

20513876 is a deficient number, since it is larger than the sum of its proper divisors (16185388).

20513876 is a wasteful number, since it uses less digits than its factorization.

20513876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671 (or 669 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 20513876 is about 4529.2246577091. The cubic root of 20513876 is about 273.7469203104.

The spelling of 20513876 in words is "twenty million, five hundred thirteen thousand, eight hundred seventy-six".