21850734 has 16 divisors (see below), whose sum is σ = 44526672. Its totient is φ = 7146048.

The previous prime is 21850733. The next prime is 21850769. The reversal of 21850734 is 43705812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21850733) 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, 34039 + ... + 34674.

It is an arithmetic number, because the mean of its divisors is an integer number (2782917).

Almost surely, 2^21850734 is an apocalyptic number.

21850734 is an abundant number, since it is smaller than the sum of its proper divisors (22675938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21850734 is a wasteful number, since it uses less digits than its factorization.

21850734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68771.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 21850734 is about 4674.4768691266. The cubic root of 21850734 is about 279.5687835211.

The spelling of 21850734 in words is "twenty-one million, eight hundred fifty thousand, seven hundred thirty-four".