21537050 has 12 divisors (see below), whose sum is σ = 40059006. Its totient is φ = 8614800.

The previous prime is 21537049. The next prime is 21537073. The reversal of 21537050 is 5073512.

It can be written as a sum of positive squares in 3 ways, for example, as 20457529 + 1079521 = 4523^2 + 1039^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 215321 + ... + 215420.

Almost surely, 2^21537050 is an apocalyptic number.

21537050 is a deficient number, since it is larger than the sum of its proper divisors (18521956).

21537050 is a wasteful number, since it uses less digits than its factorization.

21537050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430753 (or 430748 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 21537050 is about 4640.8027322867. The cubic root of 21537050 is about 278.2245223096.

The spelling of 21537050 in words is "twenty-one million, five hundred thirty-seven thousand, fifty".