21507006371432 has 16 divisors (see below), whose sum is σ = 40927512125760. Its totient is φ = 10593003137904.

The previous prime is 21507006371407. The next prime is 21507006371437. The reversal of 21507006371432 is 23417360070512.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21507006371432.

It is not an unprimeable number, because it can be changed into a prime (21507006371437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20062505408 + ... + 20062506479.

It is an arithmetic number, because the mean of its divisors is an integer number (2557969507860).

Almost surely, 2^{21507006371432} is an apocalyptic number.

It is an amenable number.

21507006371432 is a deficient number, since it is larger than the sum of its proper divisors (19420505754328).

21507006371432 is a wasteful number, since it uses less digits than its factorization.

21507006371432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40125011960 (or 40125011956 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 41.

The spelling of 21507006371432 in words is "twenty-one trillion, five hundred seven billion, six million, three hundred seventy-one thousand, four hundred thirty-two".