20046266640 has 80 divisors (see below), whose sum is σ = 69048259200. Its totient is φ = 5345670528.

The previous prime is 20046266599. The next prime is 20046266659. The reversal of 20046266640 is 4666264002.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20046266595 and 20046266604.

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, 4638180 + ... + 4642499.

It is an arithmetic number, because the mean of its divisors is an integer number (863103240).

Almost surely, 2^20046266640 is an apocalyptic number.

20046266640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20046266640 is an abundant number, since it is smaller than the sum of its proper divisors (49001992560).

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

20046266640 is a wasteful number, since it uses less digits than its factorization.

20046266640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9280701 (or 9280689 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The spelling of 20046266640 in words is "twenty billion, forty-six million, two hundred sixty-six thousand, six hundred forty".