20451123602 has 32 divisors (see below), whose sum is σ = 37764652800. Its totient is φ = 8088683328.

The previous prime is 20451123571. The next prime is 20451123619. The reversal of 20451123602 is 20632115402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 986924 + ... + 1007432.

It is an arithmetic number, because the mean of its divisors is an integer number (1180145400).

Almost surely, 2^20451123602 is an apocalyptic number.

20451123602 is a deficient number, since it is larger than the sum of its proper divisors (17313529198).

20451123602 is a wasteful number, since it uses less digits than its factorization.

20451123602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26010.

The product of its (nonzero) digits is 2880, while the sum is 26.

The spelling of 20451123602 in words is "twenty billion, four hundred fifty-one million, one hundred twenty-three thousand, six hundred two".