20206812747 has 16 divisors (see below), whose sum is σ = 29501003520. Its totient is φ = 12201021600.

The previous prime is 20206812737. The next prime is 20206812751. The reversal of 20206812747 is 74721860202.

It is a de Polignac number, because none of the positive numbers 2^k-20206812747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20206812707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1129279 + ... + 1147032.

It is an arithmetic number, because the mean of its divisors is an integer number (1843812720).

Almost surely, 2^20206812747 is an apocalyptic number.

20206812747 is a deficient number, since it is larger than the sum of its proper divisors (9294190773).

20206812747 is a wasteful number, since it uses less digits than its factorization.

20206812747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2276594.

The product of its (nonzero) digits is 75264, while the sum is 39.

The spelling of 20206812747 in words is "twenty billion, two hundred six million, eight hundred twelve thousand, seven hundred forty-seven".