20447004 has 24 divisors (see below), whose sum is σ = 48077568. Its totient is φ = 6763120.

The previous prime is 20447003. The next prime is 20447057. The reversal of 20447004 is 40074402.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20447003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4932 + ... + 8075.

It is an arithmetic number, because the mean of its divisors is an integer number (2003232).

Almost surely, 2^20447004 is an apocalyptic number.

It is an amenable number.

20447004 is an abundant number, since it is smaller than the sum of its proper divisors (27630564).

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

20447004 is a wasteful number, since it uses less digits than its factorization.

20447004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13145 (or 13143 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 21.

The square root of 20447004 is about 4521.8363526337. The cubic root of 20447004 is about 273.4491392422.

The spelling of 20447004 in words is "twenty million, four hundred forty-seven thousand, four".