21053790274 has 16 divisors (see below), whose sum is σ = 34507880640. Its totient is φ = 9554286960.

The previous prime is 21053790271. The next prime is 21053790299. The reversal of 21053790274 is 47209735012.

It is not an unprimeable number, because it can be changed into a prime (21053790271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 767094 + ... + 794065.

It is an arithmetic number, because the mean of its divisors is an integer number (2156742540).

Almost surely, 2^21053790274 is an apocalyptic number.

21053790274 is a deficient number, since it is larger than the sum of its proper divisors (13454090366).

21053790274 is a wasteful number, since it uses less digits than its factorization.

21053790274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561785.

The product of its (nonzero) digits is 105840, while the sum is 40.

The spelling of 21053790274 in words is "twenty-one billion, fifty-three million, seven hundred ninety thousand, two hundred seventy-four".