420501633381 has 24 divisors (see below), whose sum is σ = 610694308224. Its totient is φ = 278812475520.

The previous prime is 420501633329. The next prime is 420501633397. The reversal of 420501633381 is 183336105024.

420501633381 is a `hidden beast` number, since 42 + 0 + 501 + 6 + 3 + 33 + 81 = 666.

It is not a de Polignac number, because 420501633381 - 2³³ = 411911698789 is a prime.

It is a super-2 number, since 2×420501633381² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420501633301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1890676 + ... + 2101346.

It is an arithmetic number, because the mean of its divisors is an integer number (25445596176).

Almost surely, 2^420501633381 is an apocalyptic number.

It is an amenable number.

420501633381 is a deficient number, since it is larger than the sum of its proper divisors (190192674843).

420501633381 is a wasteful number, since it uses less digits than its factorization.

420501633381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211881 (or 211878 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 420501633381 in words is "four hundred twenty billion, five hundred one million, six hundred thirty-three thousand, three hundred eighty-one".