1020143303638 has 4 divisors (see below), whose sum is σ = 1530214955460. Its totient is φ = 510071651818.

The previous prime is 1020143303581. The next prime is 1020143303639. The reversal of 1020143303638 is 8363033410201.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020143303639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255035825908 + ... + 255035825911.

It is an arithmetic number, because the mean of its divisors is an integer number (382553738865).

Almost surely, 2^{1020143303638} is an apocalyptic number.

1020143303638 is a deficient number, since it is larger than the sum of its proper divisors (510071651822).

1020143303638 is an equidigital number, since it uses as much as digits as its factorization.

1020143303638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510071651821.

The product of its (nonzero) digits is 31104, while the sum is 34.

Adding to 1020143303638 its reverse (8363033410201), we get a palindrome (9383176713839).

The spelling of 1020143303638 in words is "one trillion, twenty billion, one hundred forty-three million, three hundred three thousand, six hundred thirty-eight".