21620751010 has 32 divisors (see below), whose sum is σ = 39212870400. Its totient is φ = 8582853312.

The previous prime is 21620751007. The next prime is 21620751041. The reversal of 21620751010 is 1015702612.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 776347 + ... + 803713.

It is an arithmetic number, because the mean of its divisors is an integer number (1225402200).

Almost surely, 2^21620751010 is an apocalyptic number.

21620751010 is a deficient number, since it is larger than the sum of its proper divisors (17592119390).

21620751010 is a wasteful number, since it uses less digits than its factorization.

21620751010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27970.

The product of its (nonzero) digits is 840, while the sum is 25.

The spelling of 21620751010 in words is "twenty-one billion, six hundred twenty million, seven hundred fifty-one thousand, ten".