20315136063442 has 16 divisors (see below), whose sum is σ = 33244404243264. Its totient is φ = 9233748778000.

The previous prime is 20315136063367. The next prime is 20315136063451. The reversal of 20315136063442 is 24436063151302.

It is a junction number, because it is equal to n+sod(n) for n = 20315136063395 and 20315136063404.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19684309 + ... + 20690632.

It is an arithmetic number, because the mean of its divisors is an integer number (2077775265204).

Almost surely, 2^{20315136063442} is an apocalyptic number.

20315136063442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20315136063442 is a deficient number, since it is larger than the sum of its proper divisors (12929268179822).

20315136063442 is a wasteful number, since it uses less digits than its factorization.

20315136063442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40397825.

The product of its (nonzero) digits is 311040, while the sum is 40.

The spelling of 20315136063442 in words is "twenty trillion, three hundred fifteen billion, one hundred thirty-six million, sixty-three thousand, four hundred forty-two".