20906451115 has 16 divisors (see below), whose sum is σ = 27371946240. Its totient is φ = 15202746720.

The previous prime is 20906451079. The next prime is 20906451143. The reversal of 20906451115 is 51115460902.

It is a happy number.

It is not a de Polignac number, because 20906451115 - 2⁹ = 20906450603 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 518866 + ... + 557704.

It is an arithmetic number, because the mean of its divisors is an integer number (1710746640).

Almost surely, 2^20906451115 is an apocalyptic number.

20906451115 is a deficient number, since it is larger than the sum of its proper divisors (6465495125).

20906451115 is a wasteful number, since it uses less digits than its factorization.

20906451115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48642.

The product of its (nonzero) digits is 10800, while the sum is 34.

The spelling of 20906451115 in words is "twenty billion, nine hundred six million, four hundred fifty-one thousand, one hundred fifteen".