20811013502 has 8 divisors (see below), whose sum is σ = 32573760336. Its totient is φ = 9953093392.

The previous prime is 20811013501. The next prime is 20811013541. The reversal of 20811013502 is 20531011802.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20811013501) 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, 226206623 + ... + 226206714.

It is an arithmetic number, because the mean of its divisors is an integer number (4071720042).

Almost surely, 2^20811013502 is an apocalyptic number.

20811013502 is a deficient number, since it is larger than the sum of its proper divisors (11762746834).

20811013502 is a wasteful number, since it uses less digits than its factorization.

20811013502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452413362.

The product of its (nonzero) digits is 480, while the sum is 23.

The spelling of 20811013502 in words is "twenty billion, eight hundred eleven million, thirteen thousand, five hundred two".