21622894894 has 4 divisors (see below), whose sum is σ = 32434342344. Its totient is φ = 10811447446.

The previous prime is 21622894883. The next prime is 21622894927. The reversal of 21622894894 is 49849822612.

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, 5405723722 + ... + 5405723725.

It is an arithmetic number, because the mean of its divisors is an integer number (8108585586).

Almost surely, 2^21622894894 is an apocalyptic number.

21622894894 is a deficient number, since it is larger than the sum of its proper divisors (10811447450).

21622894894 is a wasteful number, since it uses less digits than its factorization.

21622894894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10811447449.

The product of its digits is 3981312, while the sum is 55.

The spelling of 21622894894 in words is "twenty-one billion, six hundred twenty-two million, eight hundred ninety-four thousand, eight hundred ninety-four".