38237013781 has 4 divisors (see below), whose sum is σ = 38239756864. Its totient is φ = 38234270700.

The previous prime is 38237013769. The next prime is 38237013817. The reversal of 38237013781 is 18731073283.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18731073283 = 13 ⋅1440851791.

It is a cyclic number.

It is not a de Polignac number, because 38237013781 - 2¹⁹ = 38236489493 is a prime.

It is a super-2 number, since 2×38237013781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38237073781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1350525 + ... + 1378546.

It is an arithmetic number, because the mean of its divisors is an integer number (9559939216).

Almost surely, 2^38237013781 is an apocalyptic number.

It is an amenable number.

38237013781 is a deficient number, since it is larger than the sum of its proper divisors (2743083).

38237013781 is a wasteful number, since it uses less digits than its factorization.

38237013781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2743082.

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 38237013781 in words is "thirty-eight billion, two hundred thirty-seven million, thirteen thousand, seven hundred eighty-one".