21452520102 has 16 divisors (see below), whose sum is σ = 46205428080. Its totient is φ = 6600775392.

The previous prime is 21452520101. The next prime is 21452520119. The reversal of 21452520102 is 20102525412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21452520101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137516077 + ... + 137516232.

It is an arithmetic number, because the mean of its divisors is an integer number (2887839255).

Almost surely, 2^21452520102 is an apocalyptic number.

21452520102 is an abundant number, since it is smaller than the sum of its proper divisors (24752907978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21452520102 is a wasteful number, since it uses less digits than its factorization.

21452520102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275032327.

The product of its (nonzero) digits is 1600, while the sum is 24.

The spelling of 21452520102 in words is "twenty-one billion, four hundred fifty-two million, five hundred twenty thousand, one hundred two".