21888871294 has 4 divisors (see below), whose sum is σ = 32833306944. Its totient is φ = 10944435646.

The previous prime is 21888871253. The next prime is 21888871307. The reversal of 21888871294 is 49217888812.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5472217822 + ... + 5472217825.

It is an arithmetic number, because the mean of its divisors is an integer number (8208326736).

Almost surely, 2^21888871294 is an apocalyptic number.

21888871294 is a deficient number, since it is larger than the sum of its proper divisors (10944435650).

21888871294 is a wasteful number, since it uses less digits than its factorization.

21888871294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10944435649.

The product of its digits is 4128768, while the sum is 58.

The spelling of 21888871294 in words is "twenty-one billion, eight hundred eighty-eight million, eight hundred seventy-one thousand, two hundred ninety-four".