20614651 has 4 divisors (see below), whose sum is σ = 20631600. Its totient is φ = 20597704.

The previous prime is 20614619. The next prime is 20614667. The reversal of 20614651 is 15641602.

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

It is a cyclic number.

It is not a de Polignac number, because 20614651 - 2⁵ = 20614619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20614691) 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, 6496 + ... + 9133.

It is an arithmetic number, because the mean of its divisors is an integer number (5157900).

Almost surely, 2^20614651 is an apocalyptic number.

20614651 is the 2031-st centered decagonal number.

20614651 is a deficient number, since it is larger than the sum of its proper divisors (16949).

20614651 is a wasteful number, since it uses less digits than its factorization.

20614651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16948.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 20614651 is about 4540.3360007823. The cubic root of 20614651 is about 274.1944514523.

The spelling of 20614651 in words is "twenty million, six hundred fourteen thousand, six hundred fifty-one".