20426048643 has 64 divisors (see below), whose sum is σ = 36686168064. Its totient is φ = 9762768000.

The previous prime is 20426048623. The next prime is 20426048659. The reversal of 20426048643 is 34684062402.

It is not a de Polignac number, because 20426048643 - 2⁸ = 20426048387 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (20426048623) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 922998 + ... + 944868.

It is an arithmetic number, because the mean of its divisors is an integer number (573221376).

Almost surely, 2^20426048643 is an apocalyptic number.

20426048643 is a deficient number, since it is larger than the sum of its proper divisors (16260119421).

20426048643 is a wasteful number, since it uses less digits than its factorization.

20426048643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22216.

The product of its (nonzero) digits is 221184, while the sum is 39.

The spelling of 20426048643 in words is "twenty billion, four hundred twenty-six million, forty-eight thousand, six hundred forty-three".