21629050 has 24 divisors (see below), whose sum is σ = 40427100. Its totient is φ = 8609280.

The previous prime is 21629029. The next prime is 21629051. The reversal of 21629050 is 5092612.

It can be written as a sum of positive squares in 6 ways, for example, as 13155129 + 8473921 = 3627^2 + 2911^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21629051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10506 + ... + 12394.

Almost surely, 2^21629050 is an apocalyptic number.

21629050 is a deficient number, since it is larger than the sum of its proper divisors (18798050).

21629050 is a wasteful number, since it uses less digits than its factorization.

21629050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2130 (or 2125 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 21629050 is about 4650.7042477457. The cubic root of 21629050 is about 278.6201242320.

The spelling of 21629050 in words is "twenty-one million, six hundred twenty-nine thousand, fifty".