20206402 has 8 divisors (see below), whose sum is σ = 30397500. Its totient is φ = 10073904.

The previous prime is 20206391. The next prime is 20206427. The reversal of 20206402 is 20460202.

It can be written as a sum of positive squares in 2 ways, for example, as 16008001 + 4198401 = 4001^2 + 2049^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13777 + ... + 15172.

Almost surely, 2^20206402 is an apocalyptic number.

20206402 is a deficient number, since it is larger than the sum of its proper divisors (10191098).

20206402 is a wasteful number, since it uses less digits than its factorization.

20206402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29300.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 20206402 is about 4495.1531675795. The cubic root of 20206402 is about 272.3723364632.

Adding to 20206402 its reverse (20460202), we get a palindrome (40666604).

The spelling of 20206402 in words is "twenty million, two hundred six thousand, four hundred two".