154021020 has 96 divisors (see below), whose sum is σ = 471453696. Its totient is φ = 37401600.

The previous prime is 154021019. The next prime is 154021031. The reversal of 154021020 is 20120451.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29185 + ... + 34055.

It is an arithmetic number, because the mean of its divisors is an integer number (4910976).

Almost surely, 2^154021020 is an apocalyptic number.

154021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 154021020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235726848).

154021020 is an abundant number, since it is smaller than the sum of its proper divisors (317432676).

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

154021020 is a wasteful number, since it uses less digits than its factorization.

154021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4931 (or 4929 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 154021020 is about 12410.5205370283. The cubic root of 154021020 is about 536.0352273201.

Adding to 154021020 its reverse (20120451), we get a palindrome (174141471).

The spelling of 154021020 in words is "one hundred fifty-four million, twenty-one thousand, twenty".