20861306402 has 8 divisors (see below), whose sum is σ = 31292920512. Its totient is φ = 10430332900.

The previous prime is 20861306387. The next prime is 20861306471. The reversal of 20861306402 is 20460316802.

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

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 in 3 ways as a sum of consecutive naturals, for example, 68174 + ... + 215337.

It is an arithmetic number, because the mean of its divisors is an integer number (3911615064).

Almost surely, 2^20861306402 is an apocalyptic number.

20861306402 is a deficient number, since it is larger than the sum of its proper divisors (10431614110).

20861306402 is a wasteful number, since it uses less digits than its factorization.

20861306402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320304.

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 20861306402 in words is "twenty billion, eight hundred sixty-one million, three hundred six thousand, four hundred two".