21701010942 has 128 divisors (see below), whose sum is σ = 52477286400. Its totient is φ = 6607827072.

The previous prime is 21701010937. The next prime is 21701010953. The reversal of 21701010942 is 24901010712.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 46870203 + ... + 46870665.

It is an arithmetic number, because the mean of its divisors is an integer number (409978800).

Almost surely, 2^21701010942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21701010942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26238643200).

21701010942 is an abundant number, since it is smaller than the sum of its proper divisors (30776275458).

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

21701010942 is a wasteful number, since it uses less digits than its factorization.

21701010942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039 (or 1033 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The spelling of 21701010942 in words is "twenty-one billion, seven hundred one million, ten thousand, nine hundred forty-two".