21464700371 has 4 divisors (see below), whose sum is σ = 21471481152. Its totient is φ = 21457919592.

The previous prime is 21464700353. The next prime is 21464700377. The reversal of 21464700371 is 17300746412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21464700371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21464700377) 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, 3385640 + ... + 3391973.

It is an arithmetic number, because the mean of its divisors is an integer number (5367870288).

Almost surely, 2^21464700371 is an apocalyptic number.

21464700371 is a deficient number, since it is larger than the sum of its proper divisors (6780781).

21464700371 is an equidigital number, since it uses as much as digits as its factorization.

21464700371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6780780.

The product of its (nonzero) digits is 28224, while the sum is 35.

The spelling of 21464700371 in words is "twenty-one billion, four hundred sixty-four million, seven hundred thousand, three hundred seventy-one".