21772350 has 36 divisors (see below), whose sum is σ = 58496256. Its totient is φ = 5805840.

The previous prime is 21772349. The next prime is 21772367. The reversal of 21772350 is 5327712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 23742 + ... + 24641.

It is an arithmetic number, because the mean of its divisors is an integer number (1624896).

Almost surely, 2^21772350 is an apocalyptic number.

21772350 is an abundant number, since it is smaller than the sum of its proper divisors (36723906).

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

21772350 is a wasteful number, since it uses less digits than its factorization.

21772350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48401 (or 48393 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 21772350 is about 4666.0850828076. The cubic root of 21772350 is about 279.2340888118.

It can be divided in two parts, 21772 and 350, that added together give a palindrome (22122).

The spelling of 21772350 in words is "twenty-one million, seven hundred seventy-two thousand, three hundred fifty".