20632907 has 4 divisors (see below), whose sum is σ = 20645856. Its totient is φ = 20619960.

The previous prime is 20632889. The next prime is 20632919. The reversal of 20632907 is 70923602.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20632907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20632907.

It is not an unprimeable number, because it can be changed into a prime (20632607) 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, 3683 + ... + 7404.

It is an arithmetic number, because the mean of its divisors is an integer number (5161464).

Almost surely, 2^20632907 is an apocalyptic number.

20632907 is a deficient number, since it is larger than the sum of its proper divisors (12949).

20632907 is a wasteful number, since it uses less digits than its factorization.

20632907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12948.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 20632907 is about 4542.3459797774. The cubic root of 20632907 is about 274.2753682879.

The spelling of 20632907 in words is "twenty million, six hundred thirty-two thousand, nine hundred seven".