20861382377 has 16 divisors (see below), whose sum is σ = 23874238080. Its totient is φ = 18053011200.

The previous prime is 20861382343. The next prime is 20861382391. The reversal of 20861382377 is 77328316802.

It is a cyclic number.

It is not a de Polignac number, because 20861382377 - 2⁶ = 20861382313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20861382307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 437888 + ... + 483185.

It is an arithmetic number, because the mean of its divisors is an integer number (1492139880).

Almost surely, 2^20861382377 is an apocalyptic number.

It is an amenable number.

20861382377 is a deficient number, since it is larger than the sum of its proper divisors (3012855703).

20861382377 is a wasteful number, since it uses less digits than its factorization.

20861382377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921184.

The product of its (nonzero) digits is 677376, while the sum is 47.

The spelling of 20861382377 in words is "twenty billion, eight hundred sixty-one million, three hundred eighty-two thousand, three hundred seventy-seven".