20102963 has 4 divisors (see below), whose sum is σ = 20124720. Its totient is φ = 20081208.

The previous prime is 20102947. The next prime is 20102983. The reversal of 20102963 is 36920102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36920102 = 2 ⋅18460051.

It is a cyclic number.

It is not a de Polignac number, because 20102963 - 2⁴ = 20102947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20102903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9428 + ... + 11361.

It is an arithmetic number, because the mean of its divisors is an integer number (5031180).

Almost surely, 2^20102963 is an apocalyptic number.

20102963 is a deficient number, since it is larger than the sum of its proper divisors (21757).

20102963 is an equidigital number, since it uses as much as digits as its factorization.

20102963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21756.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 20102963 is about 4483.6327904948. The cubic root of 20102963 is about 271.9067722238.

The spelling of 20102963 in words is "twenty million, one hundred two thousand, nine hundred sixty-three".