20505023717002 has 32 divisors (see below), whose sum is σ = 35879177479104. Its totient is φ = 8685349152000.

The previous prime is 20505023716999. The next prime is 20505023717027. The reversal of 20505023717002 is 20071732050502.

It is a Harshad number since it is a multiple of its sum of digits (34).

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, 271379388 + ... + 271454935.

It is an arithmetic number, because the mean of its divisors is an integer number (1121224296222).

Almost surely, 2^{20505023717002} is an apocalyptic number.

20505023717002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20505023717002 is a deficient number, since it is larger than the sum of its proper divisors (15374153762102).

20505023717002 is a wasteful number, since it uses less digits than its factorization.

20505023717002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542834454.

The product of its (nonzero) digits is 29400, while the sum is 34.

Adding to 20505023717002 its reverse (20071732050502), we get a palindrome (40576755767504).

The spelling of 20505023717002 in words is "twenty trillion, five hundred five billion, twenty-three million, seven hundred seventeen thousand, two".