20145078 has 32 divisors (see below), whose sum is σ = 45532800. Its totient is φ = 6600168.

The previous prime is 20145077. The next prime is 20145089. The reversal of 20145078 is 87054102.

20145078 is a `hidden beast` number, since 201 + 450 + 7 + 8 = 666.

It is a super-3 number, since 3×20145078³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20145077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25 + ... + 6347.

It is an arithmetic number, because the mean of its divisors is an integer number (1422900).

Almost surely, 2^20145078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20145078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22766400).

20145078 is an abundant number, since it is smaller than the sum of its proper divisors (25387722).

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

20145078 is a wasteful number, since it uses less digits than its factorization.

20145078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6393 (or 6387 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 20145078 is about 4488.3268597552. The cubic root of 20145078 is about 272.0965181546.

The spelling of 20145078 in words is "twenty million, one hundred forty-five thousand, seventy-eight".