20380157376447 has 16 divisors (see below), whose sum is σ = 29766868876800. Its totient is φ = 12300359030400.

The previous prime is 20380157376443. The next prime is 20380157376457. The reversal of 20380157376447 is 74467375108302.

It is not a de Polignac number, because 20380157376447 - 2² = 20380157376443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20380157376443) 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, 1281279447 + ... + 1281295352.

It is an arithmetic number, because the mean of its divisors is an integer number (1860429304800).

Almost surely, 2^{20380157376447} is an apocalyptic number.

20380157376447 is a deficient number, since it is larger than the sum of its proper divisors (9386711500353).

20380157376447 is a wasteful number, since it uses less digits than its factorization.

20380157376447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2562575054.

The product of its (nonzero) digits is 23708160, while the sum is 57.

The spelling of 20380157376447 in words is "twenty trillion, three hundred eighty billion, one hundred fifty-seven million, three hundred seventy-six thousand, four hundred forty-seven".