420205154451 has 8 divisors (see below), whose sum is σ = 560318264784. Its totient is φ = 280114406880.

The previous prime is 420205154443. The next prime is 420205154483. The reversal of 420205154451 is 154451502024.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 420205154451 - 2³ = 420205154443 is a prime.

It is a super-2 number, since 2×420205154451² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (420205154401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5546796 + ... + 5622041.

It is an arithmetic number, because the mean of its divisors is an integer number (70039783098).

Almost surely, 2^420205154451 is an apocalyptic number.

420205154451 is a deficient number, since it is larger than the sum of its proper divisors (140113110333).

420205154451 is a wasteful number, since it uses less digits than its factorization.

420205154451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11181381.

The product of its (nonzero) digits is 32000, while the sum is 33.

Adding to 420205154451 its reverse (154451502024), we get a palindrome (574656656475).

The spelling of 420205154451 in words is "four hundred twenty billion, two hundred five million, one hundred fifty-four thousand, four hundred fifty-one".