20736501 has 16 divisors (see below), whose sum is σ = 28961664. Its totient is φ = 13172544.

The previous prime is 20736491. The next prime is 20736509. The reversal of 20736501 is 10563702.

It is not a de Polignac number, because 20736501 - 2¹⁵ = 20703733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20736509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27015 + ... + 27771.

It is an arithmetic number, because the mean of its divisors is an integer number (1810104).

Almost surely, 2^20736501 is an apocalyptic number.

It is an amenable number.

20736501 is a deficient number, since it is larger than the sum of its proper divisors (8225163).

20736501 is a wasteful number, since it uses less digits than its factorization.

20736501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 20736501 is about 4553.7348407653. The cubic root of 20736501 is about 274.7336307792.

The spelling of 20736501 in words is "twenty million, seven hundred thirty-six thousand, five hundred one".