21154660244030 has 8 divisors (see below), whose sum is σ = 38078388439272. Its totient is φ = 8461864097608.

The previous prime is 21154660244027. The next prime is 21154660244057. The reversal of 21154660244030 is 3044206645112.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1057733012192 + ... + 1057733012211.

It is an arithmetic number, because the mean of its divisors is an integer number (4759798554909).

Almost surely, 2^{21154660244030} is an apocalyptic number.

21154660244030 is a deficient number, since it is larger than the sum of its proper divisors (16923728195242).

21154660244030 is a wasteful number, since it uses less digits than its factorization.

21154660244030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2115466024410.

The product of its (nonzero) digits is 138240, while the sum is 38.

Adding to 21154660244030 its reverse (3044206645112), we get a palindrome (24198866889142).

The spelling of 21154660244030 in words is "twenty-one trillion, one hundred fifty-four billion, six hundred sixty million, two hundred forty-four thousand, thirty".