21876941629 has 4 divisors (see below), whose sum is σ = 21999159360. Its totient is φ = 21754723900.

The previous prime is 21876941627. The next prime is 21876941687. The reversal of 21876941629 is 92614967812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21876941629 - 2¹ = 21876941627 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 21876941629.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21876941627) 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, 61108597 + ... + 61108954.

It is an arithmetic number, because the mean of its divisors is an integer number (5499789840).

Almost surely, 2^21876941629 is an apocalyptic number.

It is an amenable number.

21876941629 is a deficient number, since it is larger than the sum of its proper divisors (122217731).

21876941629 is a wasteful number, since it uses less digits than its factorization.

21876941629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122217730.

The product of its digits is 2612736, while the sum is 55.

The spelling of 21876941629 in words is "twenty-one billion, eight hundred seventy-six million, nine hundred forty-one thousand, six hundred twenty-nine".