21371050 has 12 divisors (see below), whose sum is σ = 39750246. Its totient is φ = 8548400.

The previous prime is 21371047. The next prime is 21371069. The reversal of 21371050 is 5017312.

It can be written as a sum of positive squares in 3 ways, for example, as 11580409 + 9790641 = 3403^2 + 3129^2 .

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, 213661 + ... + 213760.

Almost surely, 2^21371050 is an apocalyptic number.

21371050 is a deficient number, since it is larger than the sum of its proper divisors (18379196).

21371050 is a wasteful number, since it uses less digits than its factorization.

21371050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427433 (or 427428 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 21371050 is about 4622.8832994139. The cubic root of 21371050 is about 277.5078589880.

Adding to 21371050 its reverse (5017312), we get a palindrome (26388362).

The spelling of 21371050 in words is "twenty-one million, three hundred seventy-one thousand, fifty".