145356220020 has 48 divisors (see below), whose sum is σ = 443997183168. Its totient is φ = 35237871360.

The previous prime is 145356219989. The next prime is 145356220043. The reversal of 145356220020 is 20022653541.

It is a super-2 number, since 2×145356220020² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 145356220020.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 110117689 + ... + 110119008.

It is an arithmetic number, because the mean of its divisors is an integer number (9249941316).

Almost surely, 2^145356220020 is an apocalyptic number.

145356220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145356220020 is an abundant number, since it is smaller than the sum of its proper divisors (298640963148).

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

145356220020 is a wasteful number, since it uses less digits than its factorization.

145356220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220236720 (or 220236718 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 145356220020 its reverse (20022653541), we get a palindrome (165378873561).

The spelling of 145356220020 in words is "one hundred forty-five billion, three hundred fifty-six million, two hundred twenty thousand, twenty".