20129763 has 4 divisors (see below), whose sum is σ = 26839688. Its totient is φ = 13419840.

The previous prime is 20129749. The next prime is 20129773. The reversal of 20129763 is 36792102.

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

It is not a de Polignac number, because 20129763 - 2⁹ = 20129251 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20129763.

It is not an unprimeable number, because it can be changed into a prime (20129713) 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, 3354958 + ... + 3354963.

It is an arithmetic number, because the mean of its divisors is an integer number (6709922).

Almost surely, 2^20129763 is an apocalyptic number.

20129763 is a deficient number, since it is larger than the sum of its proper divisors (6709925).

20129763 is an equidigital number, since it uses as much as digits as its factorization.

20129763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6709924.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 20129763 is about 4486.6204430506. The cubic root of 20129763 is about 272.0275482118.

The spelling of 20129763 in words is "twenty million, one hundred twenty-nine thousand, seven hundred sixty-three".