21142002672 has 160 divisors (see below), whose sum is σ = 73434585600. Its totient is φ = 5685230592.

The previous prime is 21142002671. The next prime is 21142002719. The reversal of 21142002672 is 27620024112.

21142002672 is a `hidden beast` number, since 211 + 420 + 0 + 26 + 7 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21142002671) 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, 154222 + ... + 257037.

It is an arithmetic number, because the mean of its divisors is an integer number (458966160).

Almost surely, 2^21142002672 is an apocalyptic number.

It is an amenable number.

21142002672 is an abundant number, since it is smaller than the sum of its proper divisors (52292582928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21142002672 is a wasteful number, since it uses less digits than its factorization.

21142002672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411300 (or 411288 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

Adding to 21142002672 its reverse (27620024112), we get a palindrome (48762026784).

The spelling of 21142002672 in words is "twenty-one billion, one hundred forty-two million, two thousand, six hundred seventy-two".