20620993426 has 16 divisors (see below), whose sum is σ = 34205685408. Its totient is φ = 9244778400.

The previous prime is 20620993411. The next prime is 20620993451. The reversal of 20620993426 is 62439902602.

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 7 ways as a sum of consecutive naturals, for example, 6418380 + ... + 6421591.

It is an arithmetic number, because the mean of its divisors is an integer number (2137855338).

Almost surely, 2^20620993426 is an apocalyptic number.

20620993426 is a deficient number, since it is larger than the sum of its proper divisors (13584691982).

20620993426 is a wasteful number, since it uses less digits than its factorization.

20620993426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12840057.

The product of its (nonzero) digits is 279936, while the sum is 43.

The spelling of 20620993426 in words is "twenty billion, six hundred twenty million, nine hundred ninety-three thousand, four hundred twenty-six".