21449050 has 24 divisors (see below), whose sum is σ = 45595296. Its totient is φ = 7353840.

The previous prime is 21448961. The next prime is 21449083. The reversal of 21449050 is 5094412.

It is a Harshad number since it is a multiple of its sum of digits (25).

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, 30292 + ... + 30991.

It is an arithmetic number, because the mean of its divisors is an integer number (1899804).

Almost surely, 2^21449050 is an apocalyptic number.

21449050 is an abundant number, since it is smaller than the sum of its proper divisors (24146246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21449050 is a wasteful number, since it uses less digits than its factorization.

21449050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61302 (or 61297 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 21449050 is about 4631.3119091679. The cubic root of 21449050 is about 277.8450648847.

The spelling of 21449050 in words is "twenty-one million, four hundred forty-nine thousand, fifty".