20000154 has 16 divisors (see below), whose sum is σ = 40289760. Its totient is φ = 6618480.

The previous prime is 20000153. The next prime is 20000159. The reversal of 20000154 is 45100002.

20000154 is a modest number, since divided by 154 gives 20 as remainder.

It is not an unprimeable number, because it can be changed into a prime (20000153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11157 + ... + 12824.

It is an arithmetic number, because the mean of its divisors is an integer number (2518110).

Almost surely, 2^20000154 is an apocalyptic number.

20000154 is an abundant number, since it is smaller than the sum of its proper divisors (20289606).

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

20000154 is a wasteful number, since it uses less digits than its factorization.

20000154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24125.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 20000154 is about 4472.1531726899. The cubic root of 20000154 is about 271.4424583582.

Adding to 20000154 its reverse (45100002), we get a palindrome (65100156).

The spelling of 20000154 in words is "twenty million, one hundred fifty-four", and thus it is an aban number.