20952403 has 2 divisors, whose sum is σ = 20952404. Its totient is φ = 20952402.

The previous prime is 20952401. The next prime is 20952433. The reversal of 20952403 is 30425902.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20952403 - 2¹ = 20952401 is a prime.

Together with 20952401, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20952401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10476201 + 10476202.

It is an arithmetic number, because the mean of its divisors is an integer number (10476202).

Almost surely, 2^20952403 is an apocalyptic number.

20952403 is a deficient number, since it is larger than the sum of its proper divisors (1).

20952403 is an equidigital number, since it uses as much as digits as its factorization.

20952403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 20952403 is about 4577.3794904945. The cubic root of 20952403 is about 275.6838210511.

The spelling of 20952403 in words is "twenty million, nine hundred fifty-two thousand, four hundred three".