20738437593887 has 16 divisors (see below), whose sum is σ = 22356734983968. Its totient is φ = 19123432594560.

The previous prime is 20738437593823. The next prime is 20738437593917. The reversal of 20738437593887 is 78839573483702.

It is a cyclic number.

It is not a de Polignac number, because 20738437593887 - 2⁶ = 20738437593823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20738439593887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 421034753 + ... + 421084005.

It is an arithmetic number, because the mean of its divisors is an integer number (1397295936498).

Almost surely, 2^{20738437593887} is an apocalyptic number.

20738437593887 is a deficient number, since it is larger than the sum of its proper divisors (1618297390081).

20738437593887 is a wasteful number, since it uses less digits than its factorization.

20738437593887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82010.

The product of its (nonzero) digits is 1706987520, while the sum is 74.

The spelling of 20738437593887 in words is "twenty trillion, seven hundred thirty-eight billion, four hundred thirty-seven million, five hundred ninety-three thousand, eight hundred eighty-seven".