21899050 has 24 divisors (see below), whose sum is σ = 40997376. Its totient is φ = 8702640.

The previous prime is 21899047. The next prime is 21899063. The reversal of 21899050 is 5099812.

It is a junction number, because it is equal to n+sod(n) for n = 21898997 and 21899015.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6807 + ... + 9493.

It is an arithmetic number, because the mean of its divisors is an integer number (1708224).

Almost surely, 2^21899050 is an apocalyptic number.

21899050 is a deficient number, since it is larger than the sum of its proper divisors (19098326).

21899050 is a wasteful number, since it uses less digits than its factorization.

21899050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2862 (or 2857 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 21899050 is about 4679.6420803305. The cubic root of 21899050 is about 279.7746911974.

The spelling of 21899050 in words is "twenty-one million, eight hundred ninety-nine thousand, fifty".