20451041115 has 16 divisors (see below), whose sum is σ = 34443859200. Its totient is φ = 10333157472.

The previous prime is 20451041111. The next prime is 20451041119. The reversal of 20451041115 is 51114015402.

It is an interprime number because it is at equal distance from previous prime (20451041111) and next prime (20451041119).

It is not a de Polignac number, because 20451041115 - 2² = 20451041111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20451041111) 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, 35878735 + ... + 35879304.

It is an arithmetic number, because the mean of its divisors is an integer number (2152741200).

Almost surely, 2^20451041115 is an apocalyptic number.

20451041115 is a deficient number, since it is larger than the sum of its proper divisors (13992818085).

20451041115 is a wasteful number, since it uses less digits than its factorization.

20451041115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71758066.

The product of its (nonzero) digits is 800, while the sum is 24.

Adding to 20451041115 its reverse (51114015402), we get a palindrome (71565056517).

The spelling of 20451041115 in words is "twenty billion, four hundred fifty-one million, forty-one thousand, one hundred fifteen".