20943402 has 16 divisors (see below), whose sum is σ = 42294720. Its totient is φ = 6913152.

The previous prime is 20943401. The next prime is 20943413. The reversal of 20943402 is 20434902.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20943401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16327 + ... + 17562.

It is an arithmetic number, because the mean of its divisors is an integer number (2643420).

Almost surely, 2^20943402 is an apocalyptic number.

20943402 is an abundant number, since it is smaller than the sum of its proper divisors (21351318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20943402 is a wasteful number, since it uses less digits than its factorization.

20943402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33997.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20943402 is about 4576.3961804022. The cubic root of 20943402 is about 275.6443381416.

The spelling of 20943402 in words is "twenty million, nine hundred forty-three thousand, four hundred two".