21601350742 has 16 divisors (see below), whose sum is σ = 33263600832. Its totient is φ = 10515120840.

The previous prime is 21601350637. The next prime is 21601350773. The reversal of 21601350742 is 24705310612.

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, 382684 + ... + 435487.

It is an arithmetic number, because the mean of its divisors is an integer number (2078975052).

Almost surely, 2^21601350742 is an apocalyptic number.

21601350742 is a deficient number, since it is larger than the sum of its proper divisors (11662250090).

21601350742 is a wasteful number, since it uses less digits than its factorization.

21601350742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818523.

The product of its (nonzero) digits is 10080, while the sum is 31.

The spelling of 21601350742 in words is "twenty-one billion, six hundred one million, three hundred fifty thousand, seven hundred forty-two".