21474551542 has 8 divisors (see below), whose sum is σ = 33612341616. Its totient is φ = 10270437672.

The previous prime is 21474551489. The next prime is 21474551617. The reversal of 21474551542 is 24515547412.

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

It is a super-2 number, since 2×21474551542² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21474551495 and 21474551504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233418993 + ... + 233419084.

It is an arithmetic number, because the mean of its divisors is an integer number (4201542702).

Almost surely, 2^21474551542 is an apocalyptic number.

21474551542 is a deficient number, since it is larger than the sum of its proper divisors (12137790074).

21474551542 is a wasteful number, since it uses less digits than its factorization.

21474551542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466838102.

The product of its digits is 224000, while the sum is 40.

The spelling of 21474551542 in words is "twenty-one billion, four hundred seventy-four million, five hundred fifty-one thousand, five hundred forty-two".