20152969 has 2 divisors, whose sum is σ = 20152970. Its totient is φ = 20152968.

The previous prime is 20152963. The next prime is 20153009. The reversal of 20152969 is 96925102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17330569 + 2822400 = 4163^2 + 1680^2 .

It is a cyclic number.

It is not a de Polignac number, because 20152969 - 2³ = 20152961 is a prime.

It is a super-2 number, since 2×20152969² = 812284319029922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20152961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10076484 + 10076485.

It is an arithmetic number, because the mean of its divisors is an integer number (10076485).

Almost surely, 2^20152969 is an apocalyptic number.

It is an amenable number.

20152969 is a deficient number, since it is larger than the sum of its proper divisors (1).

20152969 is an equidigital number, since it uses as much as digits as its factorization.

20152969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 20152969 is about 4489.2058317702. The cubic root of 20152969 is about 272.1320410308.

The spelling of 20152969 in words is "twenty million, one hundred fifty-two thousand, nine hundred sixty-nine".