20154380 has 12 divisors (see below), whose sum is σ = 42324240. Its totient is φ = 8061744.

The previous prime is 20154377. The next prime is 20154389. The reversal of 20154380 is 8345102.

It is not an unprimeable number, because it can be changed into a prime (20154389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503840 + ... + 503879.

It is an arithmetic number, because the mean of its divisors is an integer number (3527020).

Almost surely, 2^20154380 is an apocalyptic number.

20154380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20154380 is an abundant number, since it is smaller than the sum of its proper divisors (22169860).

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

20154380 is a wasteful number, since it uses less digits than its factorization.

20154380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007728 (or 1007726 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 20154380 is about 4489.3629837651. The cubic root of 20154380 is about 272.1383919453.

Adding to 20154380 its reverse (8345102), we get a palindrome (28499482).

The spelling of 20154380 in words is "twenty million, one hundred fifty-four thousand, three hundred eighty".