20972211 has 8 divisors (see below), whose sum is σ = 30114000. Its totient is φ = 12905952.

The previous prime is 20972179. The next prime is 20972221. The reversal of 20972211 is 11227902.

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

It is not a de Polignac number, because 20972211 - 2⁵ = 20972179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20972221) 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, 268836 + ... + 268913.

It is an arithmetic number, because the mean of its divisors is an integer number (3764250).

Almost surely, 2^20972211 is an apocalyptic number.

20972211 is a deficient number, since it is larger than the sum of its proper divisors (9141789).

20972211 is a wasteful number, since it uses less digits than its factorization.

20972211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537765.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 20972211 is about 4579.5426627557. The cubic root of 20972211 is about 275.7706690880.

The spelling of 20972211 in words is "twenty million, nine hundred seventy-two thousand, two hundred eleven".