20612501 has 8 divisors (see below), whose sum is σ = 25369344. Its totient is φ = 16308720.

The previous prime is 20612477. The next prime is 20612503. The reversal of 20612501 is 10521602.

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 20612501 - 2²² = 16418197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20612501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20612503) 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, 113165 + ... + 113346.

It is an arithmetic number, because the mean of its divisors is an integer number (3171168).

Almost surely, 2^20612501 is an apocalyptic number.

It is an amenable number.

20612501 is a deficient number, since it is larger than the sum of its proper divisors (4756843).

20612501 is a wasteful number, since it uses less digits than its factorization.

20612501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226531.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 20612501 is about 4540.0992279905. The cubic root of 20612501 is about 274.1849187731.

The spelling of 20612501 in words is "twenty million, six hundred twelve thousand, five hundred one".