145100020 has 36 divisors (see below), whose sum is σ = 329959980. Its totient is φ = 53574144.

The previous prime is 145100003. The next prime is 145100041. The reversal of 145100020 is 20001541.

It can be written as a sum of positive squares in 6 ways, for example, as 81036004 + 64064016 = 9002^2 + 8004^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18085 + ... + 24844.

It is an arithmetic number, because the mean of its divisors is an integer number (9165555).

Almost surely, 2^145100020 is an apocalyptic number.

145100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145100020 is an abundant number, since it is smaller than the sum of its proper divisors (184859960).

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

145100020 is a wasteful number, since it uses less digits than its factorization.

145100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42964 (or 42949 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 145100020 is about 12045.7469672910. The cubic root of 145100020 is about 525.4795557745.

Adding to 145100020 its reverse (20001541), we get a palindrome (165101561).

The spelling of 145100020 in words is "one hundred forty-five million, one hundred thousand, twenty".