20154030 has 64 divisors (see below), whose sum is σ = 53803008. Its totient is φ = 4798080.

The previous prime is 20154019. The next prime is 20154037. The reversal of 20154030 is 3045102.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20154037) by changing a digit.

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, 11257 + ... + 12923.

It is an arithmetic number, because the mean of its divisors is an integer number (840672).

Almost surely, 2^20154030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20154030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26901504).

20154030 is an abundant number, since it is smaller than the sum of its proper divisors (33648978).

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

20154030 is a wasteful number, since it uses less digits than its factorization.

20154030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1721.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 20154030 is about 4489.3240025643. The cubic root of 20154030 is about 272.1368166221.

Adding to 20154030 its reverse (3045102), we get a palindrome (23199132).

The spelling of 20154030 in words is "twenty million, one hundred fifty-four thousand, thirty".