20451915336 has 32 divisors (see below), whose sum is σ = 51656905440. Its totient is φ = 6747022848.

The previous prime is 20451915287. The next prime is 20451915349. The reversal of 20451915336 is 63351915402.

It is a junction number, because it is equal to n+sod(n) for n = 20451915294 and 20451915303.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4390266 + ... + 4394921.

It is an arithmetic number, because the mean of its divisors is an integer number (1614278295).

Almost surely, 2^20451915336 is an apocalyptic number.

It is an amenable number.

20451915336 is an abundant number, since it is smaller than the sum of its proper divisors (31204990104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20451915336 is a wasteful number, since it uses less digits than its factorization.

20451915336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8785293 (or 8785289 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 39.

The spelling of 20451915336 in words is "twenty billion, four hundred fifty-one million, nine hundred fifteen thousand, three hundred thirty-six".