31402020427 has 2 divisors, whose sum is σ = 31402020428. Its totient is φ = 31402020426.

The previous prime is 31402020409. The next prime is 31402020467. The reversal of 31402020427 is 72402020413.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31402020427 is a prime.

It is not a weakly prime, because it can be changed into another prime (31402020467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15701010213 + 15701010214.

It is an arithmetic number, because the mean of its divisors is an integer number (15701010214).

Almost surely, 2^31402020427 is an apocalyptic number.

31402020427 is a deficient number, since it is larger than the sum of its proper divisors (1).

31402020427 is an equidigital number, since it uses as much as digits as its factorization.

31402020427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 25.

The spelling of 31402020427 in words is "thirty-one billion, four hundred two million, twenty thousand, four hundred twenty-seven".