21874356371 has 8 divisors (see below), whose sum is σ = 25012669440. Its totient is φ = 18739394568.

The previous prime is 21874356353. The next prime is 21874356481. The reversal of 21874356371 is 17365347812.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21874356371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21874356971) 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, 823811 + ... + 849948.

It is an arithmetic number, because the mean of its divisors is an integer number (3126583680).

Almost surely, 2^21874356371 is an apocalyptic number.

21874356371 is a deficient number, since it is larger than the sum of its proper divisors (3138313069).

21874356371 is a wasteful number, since it uses less digits than its factorization.

21874356371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675633.

The product of its digits is 846720, while the sum is 47.

The spelling of 21874356371 in words is "twenty-one billion, eight hundred seventy-four million, three hundred fifty-six thousand, three hundred seventy-one".