20879763 has 4 divisors (see below), whose sum is σ = 27839688. Its totient is φ = 13919840.

The previous prime is 20879753. The next prime is 20879767. The reversal of 20879763 is 36797802.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20879763 - 2⁹ = 20879251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20879767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3479958 + ... + 3479963.

It is an arithmetic number, because the mean of its divisors is an integer number (6959922).

Almost surely, 2^20879763 is an apocalyptic number.

20879763 is a deficient number, since it is larger than the sum of its proper divisors (6959925).

20879763 is an equidigital number, since it uses as much as digits as its factorization.

20879763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6959924.

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 20879763 is about 4569.4379304243. The cubic root of 20879763 is about 275.3648622534.

The spelling of 20879763 in words is "twenty million, eight hundred seventy-nine thousand, seven hundred sixty-three".