20955049 has 2 divisors, whose sum is σ = 20955050. Its totient is φ = 20955048.

The previous prime is 20955031. The next prime is 20955071. The reversal of 20955049 is 94055902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20539024 + 416025 = 4532^2 + 645^2 .

It is a cyclic number.

It is not a de Polignac number, because 20955049 - 2⁵ = 20955017 is a prime.

It is a super-2 number, since 2×20955049² = 878228157184802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20955019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10477524 + 10477525.

It is an arithmetic number, because the mean of its divisors is an integer number (10477525).

Almost surely, 2^20955049 is an apocalyptic number.

It is an amenable number.

20955049 is a deficient number, since it is larger than the sum of its proper divisors (1).

20955049 is an equidigital number, since it uses as much as digits as its factorization.

20955049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 20955049 is about 4577.6685113713. The cubic root of 20955049 is about 275.6954255862.

The spelling of 20955049 in words is "twenty million, nine hundred fifty-five thousand, forty-nine".