20620342351 has 16 divisors (see below), whose sum is σ = 23706280960. Its totient is φ = 17569651680.

The previous prime is 20620342349. The next prime is 20620342367. The reversal of 20620342351 is 15324302602.

It is not a de Polignac number, because 20620342351 - 2¹ = 20620342349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20620342331) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1287370 + ... + 1303288.

It is an arithmetic number, because the mean of its divisors is an integer number (1481642560).

Almost surely, 2^20620342351 is an apocalyptic number.

20620342351 is a deficient number, since it is larger than the sum of its proper divisors (3085938609).

20620342351 is a wasteful number, since it uses less digits than its factorization.

20620342351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17014.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 20620342351 its reverse (15324302602), we get a palindrome (35944644953).

The spelling of 20620342351 in words is "twenty billion, six hundred twenty million, three hundred forty-two thousand, three hundred fifty-one".