21506102602 has 8 divisors (see below), whose sum is σ = 32740634016. Its totient is φ = 10592557932.

The previous prime is 21506102573. The next prime is 21506102617. The reversal of 21506102602 is 20620160512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80246518 + ... + 80246785.

It is an arithmetic number, because the mean of its divisors is an integer number (4092579252).

Almost surely, 2^21506102602 is an apocalyptic number.

21506102602 is a deficient number, since it is larger than the sum of its proper divisors (11234531414).

21506102602 is a wasteful number, since it uses less digits than its factorization.

21506102602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160493372.

The product of its (nonzero) digits is 1440, while the sum is 25.

The spelling of 21506102602 in words is "twenty-one billion, five hundred six million, one hundred two thousand, six hundred two".