21053390122758 has 64 divisors (see below), whose sum is σ = 50215586964480. Its totient is φ = 5753573709312.

The previous prime is 21053390122741. The next prime is 21053390122789. The reversal of 21053390122758 is 85722109335012.

It is a super-4 number, since 4×21053390122758⁴ (a number of 54 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40399066 + ... + 40916882.

It is an arithmetic number, because the mean of its divisors is an integer number (784618546320).

Almost surely, 2^{21053390122758} is an apocalyptic number.

21053390122758 is an abundant number, since it is smaller than the sum of its proper divisors (29162196841722).

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

21053390122758 is a wasteful number, since it uses less digits than its factorization.

21053390122758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559941.

The product of its (nonzero) digits is 907200, while the sum is 48.

The spelling of 21053390122758 in words is "twenty-one trillion, fifty-three billion, three hundred ninety million, one hundred twenty-two thousand, seven hundred fifty-eight".