21152351426055 has 32 divisors (see below), whose sum is σ = 33882586476480. Its totient is φ = 11268319211520.

The previous prime is 21152351426051. The next prime is 21152351426077. The reversal of 21152351426055 is 55062415325112.

It is a happy number.

It is not a de Polignac number, because 21152351426055 - 2² = 21152351426051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21152351425998 and 21152351426016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21152351426051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52254235 + ... + 52657475.

It is an arithmetic number, because the mean of its divisors is an integer number (1058830827390).

Almost surely, 2^{21152351426055} is an apocalyptic number.

21152351426055 is a deficient number, since it is larger than the sum of its proper divisors (12730235050425).

21152351426055 is a wasteful number, since it uses less digits than its factorization.

21152351426055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407251.

The product of its (nonzero) digits is 360000, while the sum is 42.

The spelling of 21152351426055 in words is "twenty-one trillion, one hundred fifty-two billion, three hundred fifty-one million, four hundred twenty-six thousand, fifty-five".