20812901517342 has 64 divisors (see below), whose sum is σ = 50460560236800. Its totient is φ = 6306309678240.

The previous prime is 20812901517341. The next prime is 20812901517347. The reversal of 20812901517342 is 24371510921802.

20812901517342 is a `hidden beast` number, since 2 + 0 + 8 + 1 + 2 + 90 + 1 + 517 + 3 + 42 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20812901517341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4216509 + ... + 7707447.

It is an arithmetic number, because the mean of its divisors is an integer number (788446253700).

Almost surely, 2^{20812901517342} is an apocalyptic number.

20812901517342 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20812901517342 is an abundant number, since it is smaller than the sum of its proper divisors (29647658719458).

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

20812901517342 is a wasteful number, since it uses less digits than its factorization.

20812901517342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3500998 (or 3500992 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 20812901517342 in words is "twenty trillion, eight hundred twelve billion, nine hundred one million, five hundred seventeen thousand, three hundred forty-two".