20195902 has 4 divisors (see below), whose sum is σ = 30293856. Its totient is φ = 10097950.

The previous prime is 20195893. The next prime is 20195933. The reversal of 20195902 is 20959102.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5048974 + ... + 5048977.

It is an arithmetic number, because the mean of its divisors is an integer number (7573464).

Almost surely, 2^20195902 is an apocalyptic number.

20195902 is a deficient number, since it is larger than the sum of its proper divisors (10097954).

20195902 is a wasteful number, since it uses less digits than its factorization.

20195902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10097953.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 20195902 is about 4493.9850912080. The cubic root of 20195902 is about 272.3251500146.

It can be divided in two parts, 2019 and 5902, that added together give a square (7921 = 89²).

The spelling of 20195902 in words is "twenty million, one hundred ninety-five thousand, nine hundred two".