20977273 has 8 divisors (see below), whose sum is σ = 22456800. Its totient is φ = 19535328.

The previous prime is 20977267. The next prime is 20977277. The reversal of 20977273 is 37277902.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20977273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20977277) 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, 8236 + ... + 10477.

It is an arithmetic number, because the mean of its divisors is an integer number (2807100).

Almost surely, 2^20977273 is an apocalyptic number.

It is an amenable number.

20977273 is a deficient number, since it is larger than the sum of its proper divisors (1479527).

20977273 is a wasteful number, since it uses less digits than its factorization.

20977273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18791.

The product of its (nonzero) digits is 37044, while the sum is 37.

The square root of 20977273 is about 4580.0953046853. The cubic root of 20977273 is about 275.7928546177.

The spelling of 20977273 in words is "twenty million, nine hundred seventy-seven thousand, two hundred seventy-three".