20935661942 has 16 divisors (see below), whose sum is σ = 35808508512. Its totient is φ = 9094224000.

The previous prime is 20935661911. The next prime is 20935662019. The reversal of 20935661942 is 24916653902.

It is a happy number.

It is a super-2 number, since 2×20935661942² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23682434 + ... + 23683317.

It is an arithmetic number, because the mean of its divisors is an integer number (2238031782).

Almost surely, 2^20935661942 is an apocalyptic number.

20935661942 is a deficient number, since it is larger than the sum of its proper divisors (14872846570).

20935661942 is a wasteful number, since it uses less digits than its factorization.

20935661942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47365783.

The product of its (nonzero) digits is 699840, while the sum is 47.

The spelling of 20935661942 in words is "twenty billion, nine hundred thirty-five million, six hundred sixty-one thousand, nine hundred forty-two".