20115334540 has 48 divisors (see below), whose sum is σ = 48420171072. Its totient is φ = 6876205056.

The previous prime is 20115334501. The next prime is 20115334573. The reversal of 20115334540 is 4543351102.

It is a super-2 number, since 2×20115334540² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 20115334499 and 20115334508.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165997 + ... + 260356.

It is an arithmetic number, because the mean of its divisors is an integer number (1008753564).

Almost surely, 2^20115334540 is an apocalyptic number.

20115334540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20115334540 is an abundant number, since it is smaller than the sum of its proper divisors (28304836532).

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

20115334540 is a wasteful number, since it uses less digits than its factorization.

20115334540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426706 (or 426704 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 20115334540 its reverse (4543351102), we get a palindrome (24658685642).

The spelling of 20115334540 in words is "twenty billion, one hundred fifteen million, three hundred thirty-four thousand, five hundred forty".