20115343102 has 4 divisors (see below), whose sum is σ = 30173014656. Its totient is φ = 10057671550.

The previous prime is 20115343093. The next prime is 20115343139. The reversal of 20115343102 is 20134351102.

It is a happy number.

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

It is a super-2 number, since 2×20115343102² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5028835774 + ... + 5028835777.

It is an arithmetic number, because the mean of its divisors is an integer number (7543253664).

Almost surely, 2^20115343102 is an apocalyptic number.

20115343102 is a deficient number, since it is larger than the sum of its proper divisors (10057671554).

20115343102 is a wasteful number, since it uses less digits than its factorization.

20115343102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10057671553.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 20115343102 its reverse (20134351102), we get a palindrome (40249694204).

The spelling of 20115343102 in words is "twenty billion, one hundred fifteen million, three hundred forty-three thousand, one hundred two".