21154652445 has 8 divisors (see below), whose sum is σ = 33847443936. Its totient is φ = 11282481296.

The previous prime is 21154652329. The next prime is 21154652471. The reversal of 21154652445 is 54425645112.

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

It is a cyclic number.

It is not a de Polignac number, because 21154652445 - 2⁹ = 21154651933 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 705155067 + ... + 705155096.

It is an arithmetic number, because the mean of its divisors is an integer number (4230930492).

Almost surely, 2^21154652445 is an apocalyptic number.

It is an amenable number.

21154652445 is a deficient number, since it is larger than the sum of its proper divisors (12692791491).

21154652445 is a wasteful number, since it uses less digits than its factorization.

21154652445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410310171.

The product of its digits is 192000, while the sum is 39.

The spelling of 21154652445 in words is "twenty-one billion, one hundred fifty-four million, six hundred fifty-two thousand, four hundred forty-five".