20540022515 has 16 divisors (see below), whose sum is σ = 25150625280. Its totient is φ = 16100129760.

The previous prime is 20540022497. The next prime is 20540022539. The reversal of 20540022515 is 51522004502.

It is not a de Polignac number, because 20540022515 - 2¹⁶ = 20539956979 is a prime.

It is a super-3 number, since 3×20540022515³ (a number of 32 digits) contains 333 as substring.

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, 146729 + ... + 250218.

It is an arithmetic number, because the mean of its divisors is an integer number (1571914080).

Almost surely, 2^20540022515 is an apocalyptic number.

20540022515 is a deficient number, since it is larger than the sum of its proper divisors (4610602765).

20540022515 is a wasteful number, since it uses less digits than its factorization.

20540022515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397162.

The product of its (nonzero) digits is 4000, while the sum is 26.

The spelling of 20540022515 in words is "twenty billion, five hundred forty million, twenty-two thousand, five hundred fifteen".