102019450479 has 4 divisors (see below), whose sum is σ = 136025933976. Its totient is φ = 68012966984.

The previous prime is 102019450447. The next prime is 102019450541. The reversal of 102019450479 is 974054910201.

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

It is a cyclic number.

It is not a de Polignac number, because 102019450479 - 2⁵ = 102019450447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102019450479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102019457479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17003241744 + ... + 17003241749.

It is an arithmetic number, because the mean of its divisors is an integer number (34006483494).

Almost surely, 2^102019450479 is an apocalyptic number.

102019450479 is a deficient number, since it is larger than the sum of its proper divisors (34006483497).

102019450479 is an equidigital number, since it uses as much as digits as its factorization.

102019450479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34006483496.

The product of its (nonzero) digits is 90720, while the sum is 42.

The spelling of 102019450479 in words is "one hundred two billion, nineteen million, four hundred fifty thousand, four hundred seventy-nine".