21050554994 has 8 divisors (see below), whose sum is σ = 36086665728. Its totient is φ = 9021666420.

The previous prime is 21050554957. The next prime is 21050555023. The reversal of 21050554994 is 49945505012.

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, 751805522 + ... + 751805549.

It is an arithmetic number, because the mean of its divisors is an integer number (4510833216).

Almost surely, 2^21050554994 is an apocalyptic number.

21050554994 is a deficient number, since it is larger than the sum of its proper divisors (15036110734).

21050554994 is a wasteful number, since it uses less digits than its factorization.

21050554994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503611080.

The product of its (nonzero) digits is 324000, while the sum is 44.

The spelling of 21050554994 in words is "twenty-one billion, fifty million, five hundred fifty-four thousand, nine hundred ninety-four".