20447070 has 32 divisors (see below), whose sum is σ = 56083968. Its totient is φ = 4673568.

The previous prime is 20447057. The next prime is 20447083. The reversal of 20447070 is 7074402.

It is an interprime number because it is at equal distance from previous prime (20447057) and next prime (20447083).

It is a self number, because there is not a number n which added to its sum of digits gives 20447070.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48474 + ... + 48893.

It is an arithmetic number, because the mean of its divisors is an integer number (1752624).

Almost surely, 2^20447070 is an apocalyptic number.

20447070 is an abundant number, since it is smaller than the sum of its proper divisors (35636898).

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

20447070 is a wasteful number, since it uses less digits than its factorization.

20447070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97384.

The product of its (nonzero) digits is 1568, while the sum is 24.

The square root of 20447070 is about 4521.8436505479. The cubic root of 20447070 is about 273.4494334601.

It can be divided in two parts, 204 and 47070, that added together give a palindrome (47274).

The spelling of 20447070 in words is "twenty million, four hundred forty-seven thousand, seventy".