421018949023 has 2 divisors, whose sum is σ = 421018949024. Its totient is φ = 421018949022.

The previous prime is 421018948967. The next prime is 421018949033. The reversal of 421018949023 is 320949810124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421018949023 - 2¹⁷ = 421018817951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421018949033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210509474511 + 210509474512.

It is an arithmetic number, because the mean of its divisors is an integer number (210509474512).

Almost surely, 2^421018949023 is an apocalyptic number.

421018949023 is a deficient number, since it is larger than the sum of its proper divisors (1).

421018949023 is an equidigital number, since it uses as much as digits as its factorization.

421018949023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 421018949023 in words is "four hundred twenty-one billion, eighteen million, nine hundred forty-nine thousand, twenty-three".