420951020189 has 32 divisors (see below), whose sum is σ = 511619431680. Its totient is φ = 338103585792.

The previous prime is 420951020159. The next prime is 420951020197. The reversal of 420951020189 is 981020159024.

It is not a de Polignac number, because 420951020189 - 2⁸ = 420951019933 is a prime.

It is a super-2 number, since 2×420951020189² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420951020159) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61873862 + ... + 61880664.

It is an arithmetic number, because the mean of its divisors is an integer number (15988107240).

Almost surely, 2^420951020189 is an apocalyptic number.

It is an amenable number.

420951020189 is a deficient number, since it is larger than the sum of its proper divisors (90668411491).

420951020189 is a wasteful number, since it uses less digits than its factorization.

420951020189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9029.

The product of its (nonzero) digits is 51840, while the sum is 41.

The spelling of 420951020189 in words is "four hundred twenty billion, nine hundred fifty-one million, twenty thousand, one hundred eighty-nine".