21850738 has 32 divisors (see below), whose sum is σ = 40602240. Its totient is φ = 8588160.

The previous prime is 21850733. The next prime is 21850769. The reversal of 21850738 is 83705812.

It is a super-2 number, since 2×21850738² = 954909502289288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21850733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38118 + ... + 38686.

It is an arithmetic number, because the mean of its divisors is an integer number (1268820).

Almost surely, 2^21850738 is an apocalyptic number.

21850738 is a deficient number, since it is larger than the sum of its proper divisors (18751502).

21850738 is a wasteful number, since it uses less digits than its factorization.

21850738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 21850738 is about 4674.4772969820. The cubic root of 21850738 is about 279.5688005804.

The spelling of 21850738 in words is "twenty-one million, eight hundred fifty thousand, seven hundred thirty-eight".