21140456079 has 8 divisors (see below), whose sum is σ = 28188052480. Its totient is φ = 14093248536.

The previous prime is 21140456069. The next prime is 21140456081. The reversal of 21140456079 is 97065404112.

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

It is not a de Polignac number, because 21140456079 - 2⁸ = 21140455823 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 (21140456069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71442 + ... + 217680.

It is an arithmetic number, because the mean of its divisors is an integer number (3523506560).

Almost surely, 2^21140456079 is an apocalyptic number.

21140456079 is a deficient number, since it is larger than the sum of its proper divisors (7047596401).

21140456079 is a wasteful number, since it uses less digits than its factorization.

21140456079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194429.

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 21140456079 in words is "twenty-one billion, one hundred forty million, four hundred fifty-six thousand, seventy-nine".