20942371894 has 8 divisors (see below), whose sum is σ = 31639555080. Its totient is φ = 10395853536.

The previous prime is 20942371781. The next prime is 20942371909. The reversal of 20942371894 is 49817324902.

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

It is a super-2 number, since 2×20942371894² (a number of 21 digits) contains 22 as substring.

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, 37665859 + ... + 37666414.

It is an arithmetic number, because the mean of its divisors is an integer number (3954944385).

Almost surely, 2^20942371894 is an apocalyptic number.

20942371894 is a deficient number, since it is larger than the sum of its proper divisors (10697183186).

20942371894 is a wasteful number, since it uses less digits than its factorization.

20942371894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75332414.

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 20942371894 in words is "twenty billion, nine hundred forty-two million, three hundred seventy-one thousand, eight hundred ninety-four".