21542070741 has 8 divisors (see below), whose sum is σ = 28731929664. Its totient is φ = 14356796160.

The previous prime is 21542070731. The next prime is 21542070763. The reversal of 21542070741 is 14707024512.

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

It is not a de Polignac number, because 21542070741 - 2¹⁵ = 21542037973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21542070701) 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, 1135105 + ... + 1153926.

It is an arithmetic number, because the mean of its divisors is an integer number (3591491208).

Almost surely, 2^21542070741 is an apocalyptic number.

It is an amenable number.

21542070741 is a deficient number, since it is larger than the sum of its proper divisors (7189858923).

21542070741 is a wasteful number, since it uses less digits than its factorization.

21542070741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2292171.

The product of its (nonzero) digits is 15680, while the sum is 33.

The spelling of 21542070741 in words is "twenty-one billion, five hundred forty-two million, seventy thousand, seven hundred forty-one".