20873757 has 8 divisors (see below), whose sum is σ = 28729600. Its totient is φ = 13466880.

The previous prime is 20873747. The next prime is 20873759. The reversal of 20873757 is 75737802.

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

It is not a de Polignac number, because 20873757 - 2¹² = 20869661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20873759) 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, 112132 + ... + 112317.

It is an arithmetic number, because the mean of its divisors is an integer number (3591200).

Almost surely, 2^20873757 is an apocalyptic number.

It is an amenable number.

20873757 is a deficient number, since it is larger than the sum of its proper divisors (7855843).

20873757 is a wasteful number, since it uses less digits than its factorization.

20873757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224483.

The product of its (nonzero) digits is 82320, while the sum is 39.

The square root of 20873757 is about 4568.7806907314. The cubic root of 20873757 is about 275.3384571012.

The spelling of 20873757 in words is "twenty million, eight hundred seventy-three thousand, seven hundred fifty-seven".