20644500360542 has 8 divisors (see below), whose sum is σ = 31256159424696. Its totient is φ = 10225780552312.

The previous prime is 20644500360503. The next prime is 20644500360553. The reversal of 20644500360542 is 24506300544602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20644500360542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48234813713 + ... + 48234814140.

It is an arithmetic number, because the mean of its divisors is an integer number (3907019928087).

Almost surely, 2^{20644500360542} is an apocalyptic number.

20644500360542 is a deficient number, since it is larger than the sum of its proper divisors (10611659064154).

20644500360542 is a wasteful number, since it uses less digits than its factorization.

20644500360542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96469627962.

The product of its (nonzero) digits is 691200, while the sum is 41.

The spelling of 20644500360542 in words is "twenty trillion, six hundred forty-four billion, five hundred million, three hundred sixty thousand, five hundred forty-two".