20573878 has 16 divisors (see below), whose sum is σ = 33374880. Its totient is φ = 9455616.

The previous prime is 20573869. The next prime is 20573879. The reversal of 20573878 is 87837502.

It is a self number, because there is not a number n which added to its sum of digits gives 20573878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20573879) 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, 5143 + ... + 8221.

It is an arithmetic number, because the mean of its divisors is an integer number (2085930).

Almost surely, 2^20573878 is an apocalyptic number.

20573878 is a deficient number, since it is larger than the sum of its proper divisors (12801002).

20573878 is a wasteful number, since it uses less digits than its factorization.

20573878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3351.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 20573878 is about 4535.8436921922. The cubic root of 20573878 is about 274.0135589220.

The spelling of 20573878 in words is "twenty million, five hundred seventy-three thousand, eight hundred seventy-eight".