21072630342 has 16 divisors (see below), whose sum is σ = 42164263152. Its totient is φ = 7021043040.

The previous prime is 21072630331. The next prime is 21072630343. The reversal of 21072630342 is 24303627012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21072630343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 777333 + ... + 803984.

It is an arithmetic number, because the mean of its divisors is an integer number (2635266447).

Almost surely, 2^21072630342 is an apocalyptic number.

21072630342 is an abundant number, since it is smaller than the sum of its proper divisors (21091632810).

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

21072630342 is a wasteful number, since it uses less digits than its factorization.

21072630342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583543.

The product of its (nonzero) digits is 12096, while the sum is 30.

The spelling of 21072630342 in words is "twenty-one billion, seventy-two million, six hundred thirty thousand, three hundred forty-two".