21255045106 has 8 divisors (see below), whose sum is σ = 32003794944. Its totient is φ = 10587113460.

The previous prime is 21255045101. The next prime is 21255045113. The reversal of 21255045106 is 60154055212.

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

It is not an unprimeable number, because it can be changed into a prime (21255045101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20203890 + ... + 20204941.

It is an arithmetic number, because the mean of its divisors is an integer number (4000474368).

Almost surely, 2^21255045106 is an apocalyptic number.

21255045106 is a deficient number, since it is larger than the sum of its proper divisors (10748749838).

21255045106 is a wasteful number, since it uses less digits than its factorization.

21255045106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40409096.

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 21255045106 in words is "twenty-one billion, two hundred fifty-five million, forty-five thousand, one hundred six".