21154632703 has 4 divisors (see below), whose sum is σ = 22399022880. Its totient is φ = 19910242528.

The previous prime is 21154632701. The next prime is 21154632727. The reversal of 21154632703 is 30723645112.

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 21154632703 - 2¹ = 21154632701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21154632701) 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, 622195063 + ... + 622195096.

It is an arithmetic number, because the mean of its divisors is an integer number (5599755720).

Almost surely, 2^21154632703 is an apocalyptic number.

21154632703 is a deficient number, since it is larger than the sum of its proper divisors (1244390177).

21154632703 is a wasteful number, since it uses less digits than its factorization.

21154632703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244390176.

The product of its (nonzero) digits is 30240, while the sum is 34.

The spelling of 21154632703 in words is "twenty-one billion, one hundred fifty-four million, six hundred thirty-two thousand, seven hundred three".