21346365387 has 8 divisors (see below), whose sum is σ = 28466579520. Its totient is φ = 14228530760.

The previous prime is 21346365373. The next prime is 21346365413. The reversal of 21346365387 is 78356364312.

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 21346365387 - 2²² = 21342171083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21346365587) 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, 573837 + ... + 609902.

It is an arithmetic number, because the mean of its divisors is an integer number (3558322440).

Almost surely, 2^21346365387 is an apocalyptic number.

21346365387 is a deficient number, since it is larger than the sum of its proper divisors (7120214133).

21346365387 is a wasteful number, since it uses less digits than its factorization.

21346365387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189753.

The product of its digits is 2177280, while the sum is 48.

The spelling of 21346365387 in words is "twenty-one billion, three hundred forty-six million, three hundred sixty-five thousand, three hundred eighty-seven".