20530651 has 8 divisors (see below), whose sum is σ = 21922560. Its totient is φ = 19180392.

The previous prime is 20530619. The next prime is 20530669. The reversal of 20530651 is 15603502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20530651 - 2⁵ = 20530619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20530151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9391 + ... + 11368.

It is an arithmetic number, because the mean of its divisors is an integer number (2740320).

Almost surely, 2^20530651 is an apocalyptic number.

20530651 is a deficient number, since it is larger than the sum of its proper divisors (1391909).

20530651 is a wasteful number, since it uses less digits than its factorization.

20530651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20825.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 20530651 is about 4531.0761414922. The cubic root of 20530651 is about 273.8215178404.

The spelling of 20530651 in words is "twenty million, five hundred thirty thousand, six hundred fifty-one".