21920771453030 has 32 divisors (see below), whose sum is σ = 39611876420160. Its totient is φ = 8734019912320.

The previous prime is 21920771453017. The next prime is 21920771453051. The reversal of 21920771453030 is 3035417702912.

It is a congruent number.

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, 1559900 + ... + 6802560.

It is an arithmetic number, because the mean of its divisors is an integer number (1237871138130).

Almost surely, 2^{21920771453030} is an apocalyptic number.

21920771453030 is a deficient number, since it is larger than the sum of its proper divisors (17691104967130).

21920771453030 is a wasteful number, since it uses less digits than its factorization.

21920771453030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5244304.

The product of its (nonzero) digits is 317520, while the sum is 44.

The spelling of 21920771453030 in words is "twenty-one trillion, nine hundred twenty billion, seven hundred seventy-one million, four hundred fifty-three thousand, thirty".