21710752838 has 32 divisors (see below), whose sum is σ = 35122636800. Its totient is φ = 10033466976.

The previous prime is 21710752831. The next prime is 21710752867. The reversal of 21710752838 is 83825701712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21710752831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 330395 + ... + 390617.

It is an arithmetic number, because the mean of its divisors is an integer number (1097582400).

Almost surely, 2^21710752838 is an apocalyptic number.

21710752838 is a deficient number, since it is larger than the sum of its proper divisors (13411883962).

21710752838 is a wasteful number, since it uses less digits than its factorization.

21710752838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60476.

The product of its (nonzero) digits is 188160, while the sum is 44.

The spelling of 21710752838 in words is "twenty-one billion, seven hundred ten million, seven hundred fifty-two thousand, eight hundred thirty-eight".