20378919535 has 32 divisors (see below), whose sum is σ = 26516931840. Its totient is φ = 14945914368.

The previous prime is 20378919511. The next prime is 20378919557. The reversal of 20378919535 is 53591987302.

It is a cyclic number.

It is not a de Polignac number, because 20378919535 - 2⁹ = 20378919023 is a prime.

It is a super-2 number, since 2×20378919535² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6890277 + ... + 6893233.

It is an arithmetic number, because the mean of its divisors is an integer number (828654120).

Almost surely, 2^20378919535 is an apocalyptic number.

20378919535 is a deficient number, since it is larger than the sum of its proper divisors (6138012305).

20378919535 is a wasteful number, since it uses less digits than its factorization.

20378919535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3667.

The product of its (nonzero) digits is 2041200, while the sum is 52.

The spelling of 20378919535 in words is "twenty billion, three hundred seventy-eight million, nine hundred nineteen thousand, five hundred thirty-five".