21040143034 has 4 divisors (see below), whose sum is σ = 31560214554. Its totient is φ = 10520071516.

The previous prime is 21040143013. The next prime is 21040143071. The reversal of 21040143034 is 43034104012.

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., 12444071809 + 8596071225 = 111553^2 + 92715^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21040142996 and 21040143014.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5260035757 + ... + 5260035760.

Almost surely, 2^21040143034 is an apocalyptic number.

21040143034 is a deficient number, since it is larger than the sum of its proper divisors (10520071520).

21040143034 is a wasteful number, since it uses less digits than its factorization.

21040143034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10520071519.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21040143034 its reverse (43034104012), we get a palindrome (64074247046).

The spelling of 21040143034 in words is "twenty-one billion, forty million, one hundred forty-three thousand, thirty-four".