21861762994 has 8 divisors (see below), whose sum is σ = 33099118128. Its totient is φ = 10828723620.

The previous prime is 21861762973. The next prime is 21861763031. The reversal of 21861762994 is 49926716812.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51078672 + ... + 51079099.

It is an arithmetic number, because the mean of its divisors is an integer number (4137389766).

Almost surely, 2^21861762994 is an apocalyptic number.

21861762994 is a deficient number, since it is larger than the sum of its proper divisors (11237355134).

21861762994 is a wasteful number, since it uses less digits than its factorization.

21861762994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102157880.

The product of its digits is 2612736, while the sum is 55.

The spelling of 21861762994 in words is "twenty-one billion, eight hundred sixty-one million, seven hundred sixty-two thousand, nine hundred ninety-four".