20292640680 has 128 divisors (see below), whose sum is σ = 69011510400. Its totient is φ = 4732204032.

The previous prime is 20292640633. The next prime is 20292640681. The reversal of 20292640680 is 8604629202.

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 (20292640681) 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 31 ways as a sum of consecutive naturals, for example, 312679 + ... + 371958.

It is an arithmetic number, because the mean of its divisors is an integer number (539152425).

Almost surely, 2^20292640680 is an apocalyptic number.

20292640680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20292640680 is an abundant number, since it is smaller than the sum of its proper divisors (48718869720).

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

20292640680 is a wasteful number, since it uses less digits than its factorization.

20292640680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684683 (or 684679 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 20292640680 in words is "twenty billion, two hundred ninety-two million, six hundred forty thousand, six hundred eighty".