20635012740 has 48 divisors (see below), whose sum is σ = 57795054912. Its totient is φ = 5501049216.

The previous prime is 20635012733. The next prime is 20635012751. The reversal of 20635012740 is 4721053602.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 20635012698 and 20635012707.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 162127 + ... + 259913.

It is an arithmetic number, because the mean of its divisors is an integer number (1204063644).

Almost surely, 2^20635012740 is an apocalyptic number.

20635012740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20635012740 is an abundant number, since it is smaller than the sum of its proper divisors (37160042172).

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

20635012740 is a wasteful number, since it uses less digits than its factorization.

20635012740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101316 (or 101314 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The spelling of 20635012740 in words is "twenty billion, six hundred thirty-five million, twelve thousand, seven hundred forty".