21771114 has 32 divisors (see below), whose sum is σ = 45643776. Its totient is φ = 6914160.

The previous prime is 21771097. The next prime is 21771121. The reversal of 21771114 is 41117712.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11589 + ... + 13335.

It is an arithmetic number, because the mean of its divisors is an integer number (1426368).

Almost surely, 2^21771114 is an apocalyptic number.

21771114 is an abundant number, since it is smaller than the sum of its proper divisors (23872662).

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

21771114 is a wasteful number, since it uses less digits than its factorization.

21771114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850.

The product of its digits is 392, while the sum is 24.

The square root of 21771114 is about 4665.9526358505. The cubic root of 21771114 is about 279.2288047418.

Adding to 21771114 its reverse (41117712), we get a palindrome (62888826).

The spelling of 21771114 in words is "twenty-one million, seven hundred seventy-one thousand, one hundred fourteen".