20501045 has 8 divisors (see below), whose sum is σ = 24625824. Its totient is φ = 16384464.

The previous prime is 20501029. The next prime is 20501069. The reversal of 20501045 is 54010502.

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 20501045 - 2⁴ = 20501029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7562 + ... + 9908.

It is an arithmetic number, because the mean of its divisors is an integer number (3078228).

Almost surely, 2^20501045 is an apocalyptic number.

It is an amenable number.

20501045 is a deficient number, since it is larger than the sum of its proper divisors (4124779).

20501045 is a wasteful number, since it uses less digits than its factorization.

20501045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4099.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 20501045 is about 4527.8079685428. The cubic root of 20501045 is about 273.6898340839.

Adding to 20501045 its reverse (54010502), we get a palindrome (74511547).

The spelling of 20501045 in words is "twenty million, five hundred one thousand, forty-five".