20356651032642 has 32 divisors (see below), whose sum is σ = 45238525977600. Its totient is φ = 6785321791824.

The previous prime is 20356651032629. The next prime is 20356651032709. The reversal of 20356651032642 is 24623015665302.

20356651032642 is a `hidden beast` number, since 2 + 0 + 3 + 5 + 66 + 510 + 32 + 6 + 42 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4726813 + ... + 7940784.

It is an arithmetic number, because the mean of its divisors is an integer number (1413703936800).

Almost surely, 2^{20356651032642} is an apocalyptic number.

20356651032642 is an abundant number, since it is smaller than the sum of its proper divisors (24881874944958).

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

20356651032642 is a wasteful number, since it uses less digits than its factorization.

20356651032642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12697367 (or 12697361 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 45.

Adding to 20356651032642 its reverse (24623015665302), we get a palindrome (44979666697944).

The spelling of 20356651032642 in words is "twenty trillion, three hundred fifty-six billion, six hundred fifty-one million, thirty-two thousand, six hundred forty-two".