20900771 has 8 divisors (see below), whose sum is σ = 21196800. Its totient is φ = 20607048.

The previous prime is 20900753. The next prime is 20900773. The reversal of 20900771 is 17700902.

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 20900771 - 2⁶ = 20900707 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 20900771.

It is not an unprimeable number, because it can be changed into a prime (20900773) 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, 24860 + ... + 25686.

It is an arithmetic number, because the mean of its divisors is an integer number (2649600).

Almost surely, 2^20900771 is an apocalyptic number.

20900771 is a deficient number, since it is larger than the sum of its proper divisors (296029).

20900771 is a wasteful number, since it uses less digits than its factorization.

20900771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153.

The product of its (nonzero) digits is 882, while the sum is 26.

The square root of 20900771 is about 4571.7361034950. The cubic root of 20900771 is about 275.4571833201.

The spelling of 20900771 in words is "twenty million, nine hundred thousand, seven hundred seventy-one".