21154714 has 32 divisors (see below), whose sum is σ = 38776320. Its totient is φ = 8453808.

The previous prime is 21154711. The next prime is 21154759. The reversal of 21154714 is 41745112.

It is not an unprimeable number, because it can be changed into a prime (21154711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17229 + ... + 18415.

It is an arithmetic number, because the mean of its divisors is an integer number (1211760).

Almost surely, 2^21154714 is an apocalyptic number.

21154714 is a deficient number, since it is larger than the sum of its proper divisors (17621606).

21154714 is a wasteful number, since it uses less digits than its factorization.

21154714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282.

The product of its digits is 1120, while the sum is 25.

The square root of 21154714 is about 4599.4253988950. The cubic root of 21154714 is about 276.5682910190.

Adding to 21154714 its reverse (41745112), we get a palindrome (62899826).

The spelling of 21154714 in words is "twenty-one million, one hundred fifty-four thousand, seven hundred fourteen".