20249902 has 4 divisors (see below), whose sum is σ = 30374856. Its totient is φ = 10124950.

The previous prime is 20249893. The next prime is 20249963. The reversal of 20249902 is 20994202.

It is a happy number.

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, 5062474 + ... + 5062477.

It is an arithmetic number, because the mean of its divisors is an integer number (7593714).

Almost surely, 2^20249902 is an apocalyptic number.

20249902 is a deficient number, since it is larger than the sum of its proper divisors (10124954).

20249902 is a wasteful number, since it uses less digits than its factorization.

20249902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10124953.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 20249902 is about 4499.9891110979. The cubic root of 20249902 is about 272.5676492258.

The spelling of 20249902 in words is "twenty million, two hundred forty-nine thousand, nine hundred two".