21249654055270 has 16 divisors (see below), whose sum is σ = 40499340670368. Its totient is φ = 7999869761920.

The previous prime is 21249654055213. The next prime is 21249654055337. The reversal of 21249654055270 is 7255045694212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62498982346 + ... + 62498982685.

It is an arithmetic number, because the mean of its divisors is an integer number (2531208791898).

Almost surely, 2^{21249654055270} is an apocalyptic number.

21249654055270 is a deficient number, since it is larger than the sum of its proper divisors (19249686615098).

21249654055270 is a wasteful number, since it uses less digits than its factorization.

21249654055270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124997965055.

The product of its (nonzero) digits is 6048000, while the sum is 52.

The spelling of 21249654055270 in words is "twenty-one trillion, two hundred forty-nine billion, six hundred fifty-four million, fifty-five thousand, two hundred seventy".