420520217835 has 16 divisors (see below), whose sum is σ = 672860837376. Its totient is φ = 224267953248.

The previous prime is 420520217797. The next prime is 420520217837. The reversal of 420520217835 is 538712025024.

It is not a de Polignac number, because 420520217835 - 2²¹ = 420518120683 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420520217793 and 420520217802.

It is not an unprimeable number, because it can be changed into a prime (420520217837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219859 + ... + 943068.

It is an arithmetic number, because the mean of its divisors is an integer number (42053802336).

Almost surely, 2^420520217835 is an apocalyptic number.

420520217835 is a deficient number, since it is larger than the sum of its proper divisors (252340619541).

420520217835 is a wasteful number, since it uses less digits than its factorization.

420520217835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187042.

The product of its (nonzero) digits is 134400, while the sum is 39.

The spelling of 420520217835 in words is "four hundred twenty billion, five hundred twenty million, two hundred seventeen thousand, eight hundred thirty-five".