21614156 has 6 divisors (see below), whose sum is σ = 37824780. Its totient is φ = 10807076.

The previous prime is 21614149. The next prime is 21614183. The reversal of 21614156 is 65141612.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2701766 + ... + 2701773.

It is an arithmetic number, because the mean of its divisors is an integer number (6304130).

Almost surely, 2^21614156 is an apocalyptic number.

It is an amenable number.

21614156 is a deficient number, since it is larger than the sum of its proper divisors (16210624).

21614156 is a wasteful number, since it uses less digits than its factorization.

21614156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5403543 (or 5403541 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 21614156 is about 4649.1027091257. The cubic root of 21614156 is about 278.5561559267.

Adding to 21614156 its reverse (65141612), we get a palindrome (86755768).

The spelling of 21614156 in words is "twenty-one million, six hundred fourteen thousand, one hundred fifty-six".