21958275555142 has 8 divisors (see below), whose sum is σ = 32939418459816. Its totient is φ = 10978469401872.

The previous prime is 21958275555137. The next prime is 21958275555173. The reversal of 21958275555142 is 24155557285912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334146783 + ... + 334212490.

It is an arithmetic number, because the mean of its divisors is an integer number (4117427307477).

Almost surely, 2^{21958275555142} is an apocalyptic number.

21958275555142 is a deficient number, since it is larger than the sum of its proper divisors (10981142904674).

21958275555142 is a wasteful number, since it uses less digits than its factorization.

21958275555142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668375702.

The product of its digits is 50400000, while the sum is 61.

The spelling of 21958275555142 in words is "twenty-one trillion, nine hundred fifty-eight billion, two hundred seventy-five million, five hundred fifty-five thousand, one hundred forty-two".