21134556055 has 16 divisors (see below), whose sum is σ = 26254245600. Its totient is φ = 16313270400.

The previous prime is 21134556049. The next prime is 21134556061. The reversal of 21134556055 is 55065543112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21134556049) and next prime (21134556061).

It is not a de Polignac number, because 21134556055 - 2⁷ = 21134555927 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161605 + ... + 261505.

It is an arithmetic number, because the mean of its divisors is an integer number (1640890350).

Almost surely, 2^21134556055 is an apocalyptic number.

21134556055 is a deficient number, since it is larger than the sum of its proper divisors (5119689545).

21134556055 is a wasteful number, since it uses less digits than its factorization.

21134556055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101394.

The product of its (nonzero) digits is 90000, while the sum is 37.

The spelling of 21134556055 in words is "twenty-one billion, one hundred thirty-four million, five hundred fifty-six thousand, fifty-five".