20674946940 has 24 divisors (see below), whose sum is σ = 57889851600. Its totient is φ = 5513319168.

The previous prime is 20674946939. The next prime is 20674946947. The reversal of 20674946940 is 4964947602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20674946947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172291165 + ... + 172291284.

It is an arithmetic number, because the mean of its divisors is an integer number (2412077150).

Almost surely, 2^20674946940 is an apocalyptic number.

20674946940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20674946940 is an abundant number, since it is smaller than the sum of its proper divisors (37214904660).

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

20674946940 is a wasteful number, since it uses less digits than its factorization.

20674946940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344582461 (or 344582459 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 51.

The spelling of 20674946940 in words is "twenty billion, six hundred seventy-four million, nine hundred forty-six thousand, nine hundred forty".