20630757340 has 24 divisors (see below), whose sum is σ = 43771239792. Its totient is φ = 8167226880.

The previous prime is 20630757293. The next prime is 20630757341. The reversal of 20630757340 is 4375703602.

It is a self number, because there is not a number n which added to its sum of digits gives 20630757340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20630757341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5315266 + ... + 5319145.

It is an arithmetic number, because the mean of its divisors is an integer number (1823801658).

Almost surely, 2^20630757340 is an apocalyptic number.

20630757340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20630757340 is an abundant number, since it is smaller than the sum of its proper divisors (23140482452).

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

20630757340 is a wasteful number, since it uses less digits than its factorization.

20630757340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10634517 (or 10634515 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 37.

The spelling of 20630757340 in words is "twenty billion, six hundred thirty million, seven hundred fifty-seven thousand, three hundred forty".