20435072 has 32 divisors (see below), whose sum is σ = 46528320. Its totient is φ = 8757504.

The previous prime is 20435059. The next prime is 20435099. The reversal of 20435072 is 27053402.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10508 + ... + 12299.

It is an arithmetic number, because the mean of its divisors is an integer number (1454010).

Almost surely, 2^20435072 is an apocalyptic number.

It is an amenable number.

20435072 is an abundant number, since it is smaller than the sum of its proper divisors (26093248).

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

20435072 is an equidigital number, since it uses as much as digits as its factorization.

20435072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22828 (or 22816 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 20435072 is about 4520.5167846166. The cubic root of 20435072 is about 273.3959378048.

Adding to 20435072 its reverse (27053402), we get a palindrome (47488474).

The spelling of 20435072 in words is "twenty million, four hundred thirty-five thousand, seventy-two".