21877274 has 8 divisors (see below), whose sum is σ = 33074688. Its totient is φ = 10852380.

The previous prime is 21877253. The next prime is 21877279. The reversal of 21877274 is 47277812.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21877279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42812 + ... + 43319.

It is an arithmetic number, because the mean of its divisors is an integer number (4134336).

Almost surely, 2^21877274 is an apocalyptic number.

21877274 is a deficient number, since it is larger than the sum of its proper divisors (11197414).

21877274 is a wasteful number, since it uses less digits than its factorization.

21877274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86260.

The product of its digits is 43904, while the sum is 38.

The square root of 21877274 is about 4677.3148279756. The cubic root of 21877274 is about 279.6819262271.

The spelling of 21877274 in words is "twenty-one million, eight hundred seventy-seven thousand, two hundred seventy-four".