21140758 has 16 divisors (see below), whose sum is σ = 33662304. Its totient is φ = 9923200.

The previous prime is 21140753. The next prime is 21140759. The reversal of 21140758 is 85704112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21140753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23391 + ... + 24277.

It is an arithmetic number, because the mean of its divisors is an integer number (2103894).

Almost surely, 2^21140758 is an apocalyptic number.

21140758 is a deficient number, since it is larger than the sum of its proper divisors (12521546).

21140758 is a wasteful number, since it uses less digits than its factorization.

21140758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1607.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 21140758 is about 4597.9080025594. The cubic root of 21140758 is about 276.5074592479.

The spelling of 21140758 in words is "twenty-one million, one hundred forty thousand, seven hundred fifty-eight".