21054280290 has 32 divisors (see below), whose sum is σ = 50639916096. Its totient is φ = 5602292160.

The previous prime is 21054280279. The next prime is 21054280337. The reversal of 21054280290 is 9208245012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 747352 + ... + 775011.

It is an arithmetic number, because the mean of its divisors is an integer number (1582497378).

Almost surely, 2^21054280290 is an apocalyptic number.

21054280290 is an abundant number, since it is smaller than the sum of its proper divisors (29585635806).

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

21054280290 is a wasteful number, since it uses less digits than its factorization.

21054280290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522834.

The product of its (nonzero) digits is 11520, while the sum is 33.

The spelling of 21054280290 in words is "twenty-one billion, fifty-four million, two hundred eighty thousand, two hundred ninety".