21739413070 has 8 divisors (see below), whose sum is σ = 39130943544. Its totient is φ = 8695765224.

The previous prime is 21739413053. The next prime is 21739413077. The reversal of 21739413070 is 7031493712.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21739413077) 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, 1086970644 + ... + 1086970663.

It is an arithmetic number, because the mean of its divisors is an integer number (4891367943).

Almost surely, 2^21739413070 is an apocalyptic number.

21739413070 is a deficient number, since it is larger than the sum of its proper divisors (17391530474).

21739413070 is a wasteful number, since it uses less digits than its factorization.

21739413070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2173941314.

The product of its (nonzero) digits is 31752, while the sum is 37.

The spelling of 21739413070 in words is "twenty-one billion, seven hundred thirty-nine million, four hundred thirteen thousand, seventy".