20440451210 has 32 divisors (see below), whose sum is σ = 38499598080. Its totient is φ = 7798878208.

The previous prime is 20440451201. The next prime is 20440451219. The reversal of 20440451210 is 1215404402.

It is an interprime number because it is at equal distance from previous prime (20440451201) and next prime (20440451219).

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (20440451219) 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, 41207 + ... + 206346.

It is an arithmetic number, because the mean of its divisors is an integer number (1203112440).

Almost surely, 2^20440451210 is an apocalyptic number.

20440451210 is a deficient number, since it is larger than the sum of its proper divisors (18059146870).

20440451210 is a wasteful number, since it uses less digits than its factorization.

20440451210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247942.

The product of its (nonzero) digits is 1280, while the sum is 23.

Adding to 20440451210 its reverse (1215404402), we get a palindrome (21655855612).

The spelling of 20440451210 in words is "twenty billion, four hundred forty million, four hundred fifty-one thousand, two hundred ten".