20135222215475 has 24 divisors (see below), whose sum is σ = 25210730338560. Its totient is φ = 15951376300320.

The previous prime is 20135222215453. The next prime is 20135222215477. The reversal of 20135222215475 is 57451222253102.

It is not a de Polignac number, because 20135222215475 - 2³⁸ = 19860344308531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20135222215477) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 134801282 + ... + 134950568.

It is an arithmetic number, because the mean of its divisors is an integer number (1050447097440).

Almost surely, 2^{20135222215475} is an apocalyptic number.

20135222215475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20135222215475 is a deficient number, since it is larger than the sum of its proper divisors (5075508123085).

20135222215475 is a wasteful number, since it uses less digits than its factorization.

20135222215475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201779 (or 201774 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 41.

Adding to 20135222215475 its reverse (57451222253102), we get a palindrome (77586444468577).

The spelling of 20135222215475 in words is "twenty trillion, one hundred thirty-five billion, two hundred twenty-two million, two hundred fifteen thousand, four hundred seventy-five".