20946373820 has 24 divisors (see below), whose sum is σ = 44376658704. Its totient is φ = 8304402176.

The previous prime is 20946373801. The next prime is 20946373879. The reversal of 20946373820 is 2837364902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4631894 + ... + 4636413.

It is an arithmetic number, because the mean of its divisors is an integer number (1849027446).

Almost surely, 2^20946373820 is an apocalyptic number.

20946373820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20946373820 is an abundant number, since it is smaller than the sum of its proper divisors (23430284884).

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

20946373820 is a wasteful number, since it uses less digits than its factorization.

20946373820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9268429 (or 9268427 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 20946373820 in words is "twenty billion, nine hundred forty-six million, three hundred seventy-three thousand, eight hundred twenty".