21772414 has 4 divisors (see below), whose sum is σ = 32658624. Its totient is φ = 10886206.

The previous prime is 21772381. The next prime is 21772433. The reversal of 21772414 is 41427712.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×21772414² = 948076022774792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5443102 + ... + 5443105.

It is an arithmetic number, because the mean of its divisors is an integer number (8164656).

Almost surely, 2^21772414 is an apocalyptic number.

21772414 is a deficient number, since it is larger than the sum of its proper divisors (10886210).

21772414 is a wasteful number, since it uses less digits than its factorization.

21772414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10886209.

The product of its digits is 3136, while the sum is 28.

The square root of 21772414 is about 4666.0919408001. The cubic root of 21772414 is about 279.2343624152.

The spelling of 21772414 in words is "twenty-one million, seven hundred seventy-two thousand, four hundred fourteen".