19642011002 has 4 divisors (see below), whose sum is σ = 29463016506. Its totient is φ = 9821005500.

The previous prime is 19642010977. The next prime is 19642011043. The reversal of 19642011002 is 20011024691.

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

It can be written as a sum of positive squares in only one way, i.e., 14059082041 + 5582928961 = 118571^2 + 74719^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4910502749 + ... + 4910502752.

Almost surely, 2^19642011002 is an apocalyptic number.

19642011002 is a deficient number, since it is larger than the sum of its proper divisors (9821005504).

19642011002 is an equidigital number, since it uses as much as digits as its factorization.

19642011002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9821005503.

The product of its (nonzero) digits is 864, while the sum is 26.

Adding to 19642011002 its reverse (20011024691), we get a palindrome (39653035693).

The spelling of 19642011002 in words is "nineteen billion, six hundred forty-two million, eleven thousand, two".