21834790756 has 9 divisors (see below), whose sum is σ = 38211401011. Its totient is φ = 10917247612.

The previous prime is 21834790753. The next prime is 21834790763. The reversal of 21834790756 is 65709743812.

The square root of 21834790756 is 147766.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21834790753) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 258591 + ... + 332473.

It is a 1-persistent number, because it is pandigital, but 2⋅21834790756 = 43669581512 is not.

Almost surely, 2^21834790756 is an apocalyptic number.

21834790756 is the 147766-th square number.

It is an amenable number.

21834790756 is a deficient number, since it is larger than the sum of its proper divisors (16376610255).

21834790756 is an frugal number, since it uses more digits than its factorization.

21834790756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147770 (or 73885 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 21834790756 in words is "twenty-one billion, eight hundred thirty-four million, seven hundred ninety thousand, seven hundred fifty-six".