20145070 has 32 divisors (see below), whose sum is σ = 40487040. Its totient is φ = 7153440.

The previous prime is 20145031. The next prime is 20145077. The reversal of 20145070 is 7054102.

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, 2601 + ... + 6859.

It is an arithmetic number, because the mean of its divisors is an integer number (1265220).

Almost surely, 2^20145070 is an apocalyptic number.

20145070 is an abundant number, since it is smaller than the sum of its proper divisors (20341970).

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

20145070 is a wasteful number, since it uses less digits than its factorization.

20145070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4320.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 20145070 is about 4488.3259685544. The cubic root of 20145070 is about 272.0964821363.

Adding to 20145070 its reverse (7054102), we get a palindrome (27199172).

The spelling of 20145070 in words is "twenty million, one hundred forty-five thousand, seventy".