145420405020 has 72 divisors (see below), whose sum is σ = 481209346800. Its totient is φ = 35253431040.

The previous prime is 145420404991. The next prime is 145420405093. The reversal of 145420405020 is 20504024541.

145420405020 is a `hidden beast` number, since 1 + 454 + 204 + 0 + 5 + 0 + 2 + 0 = 666.

145420405020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×145420405020² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36720345 + ... + 36724304.

It is an arithmetic number, because the mean of its divisors is an integer number (6683463150).

Almost surely, 2^145420405020 is an apocalyptic number.

145420405020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145420405020 is an abundant number, since it is smaller than the sum of its proper divisors (335788941780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145420405020 is a wasteful number, since it uses less digits than its factorization.

145420405020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73444675 (or 73444670 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

Adding to 145420405020 its reverse (20504024541), we get a palindrome (165924429561).

The spelling of 145420405020 in words is "one hundred forty-five billion, four hundred twenty million, four hundred five thousand, twenty".