20621036426 has 32 divisors (see below), whose sum is σ = 31536267840. Its totient is φ = 10111095936.

The previous prime is 20621036419. The next prime is 20621036453. The reversal of 20621036426 is 62463012602.

It is a junction number, because it is equal to n+sod(n) for n = 20621036392 and 20621036401.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17371805 + ... + 17372991.

It is an arithmetic number, because the mean of its divisors is an integer number (985508370).

Almost surely, 2^20621036426 is an apocalyptic number.

20621036426 is a deficient number, since it is larger than the sum of its proper divisors (10915231414).

20621036426 is a wasteful number, since it uses less digits than its factorization.

20621036426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1958.

The product of its (nonzero) digits is 20736, while the sum is 32.

The spelling of 20621036426 in words is "twenty billion, six hundred twenty-one million, thirty-six thousand, four hundred twenty-six".