20306247902 has 4 divisors (see below), whose sum is σ = 30459371856. Its totient is φ = 10153123950.

The previous prime is 20306247823. The next prime is 20306247919. The reversal of 20306247902 is 20974260302.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5076561974 + ... + 5076561977.

It is an arithmetic number, because the mean of its divisors is an integer number (7614842964).

Almost surely, 2^20306247902 is an apocalyptic number.

20306247902 is a deficient number, since it is larger than the sum of its proper divisors (10153123954).

20306247902 is a wasteful number, since it uses less digits than its factorization.

20306247902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10153123953.

The product of its (nonzero) digits is 36288, while the sum is 35.

The spelling of 20306247902 in words is "twenty billion, three hundred six million, two hundred forty-seven thousand, nine hundred two".