31426242019 has 4 divisors (see below), whose sum is σ = 31426674496. Its totient is φ = 31425809544.

The previous prime is 31426242013. The next prime is 31426242037. The reversal of 31426242019 is 91024262413.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31426242019 - 2¹⁵ = 31426209251 is a prime.

It is a super-2 number, since 2×31426242019² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31426242013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77619 + ... + 262444.

It is an arithmetic number, because the mean of its divisors is an integer number (7856668624).

Almost surely, 2^31426242019 is an apocalyptic number.

31426242019 is a deficient number, since it is larger than the sum of its proper divisors (432477).

31426242019 is an equidigital number, since it uses as much as digits as its factorization.

31426242019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432476.

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 31426242019 in words is "thirty-one billion, four hundred twenty-six million, two hundred forty-two thousand, nineteen".