420905421718 has 32 divisors (see below), whose sum is σ = 673220734560. Its totient is φ = 196678126080.

The previous prime is 420905421707. The next prime is 420905421773. The reversal of 420905421718 is 817124509024.

It is a super-2 number, since 2×420905421718² (a number of 24 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 15 ways as a sum of consecutive naturals, for example, 2831713 + ... + 2976643.

It is an arithmetic number, because the mean of its divisors is an integer number (21038147955).

Almost surely, 2^420905421718 is an apocalyptic number.

420905421718 is a deficient number, since it is larger than the sum of its proper divisors (252315312842).

420905421718 is a wasteful number, since it uses less digits than its factorization.

420905421718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145552.

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 420905421718 in words is "four hundred twenty billion, nine hundred five million, four hundred twenty-one thousand, seven hundred eighteen".