20349994797 has 32 divisors (see below), whose sum is σ = 33214561920. Its totient is φ = 12211200000.

The previous prime is 20349994787. The next prime is 20349994807. The reversal of 20349994797 is 79749994302.

It is an interprime number because it is at equal distance from previous prime (20349994787) and next prime (20349994807).

It is not a de Polignac number, because 20349994797 - 2⁴ = 20349994781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20349994747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 309204 + ... + 369197.

It is an arithmetic number, because the mean of its divisors is an integer number (1037955060).

Almost surely, 2^20349994797 is an apocalyptic number.

20349994797 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20349994797 is a deficient number, since it is larger than the sum of its proper divisors (12864567123).

20349994797 is a wasteful number, since it uses less digits than its factorization.

20349994797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678522 (or 678516 counting only the distinct ones).

The product of its (nonzero) digits is 30862944, while the sum is 63.

It can be divided in two parts, 203 and 49994797, that added together give a triangular number (49995000 = T₉₉₉₉).

The spelling of 20349994797 in words is "twenty billion, three hundred forty-nine million, nine hundred ninety-four thousand, seven hundred ninety-seven".