21737342342542 has 32 divisors (see below), whose sum is σ = 33702743015424. Its totient is φ = 10508705244000.

The previous prime is 21737342342539. The next prime is 21737342342543. The reversal of 21737342342542 is 24524324373712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21737342342543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173695792 + ... + 173820892.

It is an arithmetic number, because the mean of its divisors is an integer number (1053210719232).

Almost surely, 2^{21737342342542} is an apocalyptic number.

21737342342542 is a deficient number, since it is larger than the sum of its proper divisors (11965400672882).

21737342342542 is a wasteful number, since it uses less digits than its factorization.

21737342342542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147504.

The product of its digits is 6773760, while the sum is 49.

The spelling of 21737342342542 in words is "twenty-one trillion, seven hundred thirty-seven billion, three hundred forty-two million, three hundred forty-two thousand, five hundred forty-two".