20115038680 has 32 divisors (see below), whose sum is σ = 49373277840. Its totient is φ = 7314559360.

The previous prime is 20115038653. The next prime is 20115038683. The reversal of 20115038680 is 8683051102.

It is a super-2 number, since 2×20115038680² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20115038683) 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, 22857559 + ... + 22858438.

Almost surely, 2^20115038680 is an apocalyptic number.

20115038680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20115038680 is an abundant number, since it is smaller than the sum of its proper divisors (29258239160).

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

20115038680 is a wasteful number, since it uses less digits than its factorization.

20115038680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45716019 (or 45716015 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

Adding to 20115038680 its reverse (8683051102), we get a palindrome (28798089782).

The spelling of 20115038680 in words is "twenty billion, one hundred fifteen million, thirty-eight thousand, six hundred eighty".