420921713390 has 16 divisors (see below), whose sum is σ = 757667409408. Its totient is φ = 168366835296.

The previous prime is 420921713383. The next prime is 420921713393. The reversal of 420921713390 is 93317129024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420921713393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1076444 + ... + 1414416.

It is an arithmetic number, because the mean of its divisors is an integer number (47354213088).

Almost surely, 2^420921713390 is an apocalyptic number.

420921713390 is a deficient number, since it is larger than the sum of its proper divisors (336745696018).

420921713390 is a wasteful number, since it uses less digits than its factorization.

420921713390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462523.

The product of its (nonzero) digits is 81648, while the sum is 41.

It can be divided in two parts, 420921 and 713390, that added together give a palindrome (1134311).

The spelling of 420921713390 in words is "four hundred twenty billion, nine hundred twenty-one million, seven hundred thirteen thousand, three hundred ninety".