21612036741424 has 40 divisors (see below), whose sum is σ = 43324776768960. Its totient is φ = 10431579045888.

The previous prime is 21612036741401. The next prime is 21612036741479. The reversal of 21612036741424 is 42414763021612.

It is a happy number.

It is a super-2 number, since 2×21612036741424² (a number of 27 digits) contains 22 as substring.

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, 1390417 + ... + 6719920.

It is an arithmetic number, because the mean of its divisors is an integer number (1083119419224).

Almost surely, 2^{21612036741424} is an apocalyptic number.

It is an amenable number.

21612036741424 is an abundant number, since it is smaller than the sum of its proper divisors (21712740027536).

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

21612036741424 is a wasteful number, since it uses less digits than its factorization.

21612036741424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8116117 (or 8116111 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 43.

The spelling of 21612036741424 in words is "twenty-one trillion, six hundred twelve billion, thirty-six million, seven hundred forty-one thousand, four hundred twenty-four".