20831219435290 has 32 divisors (see below), whose sum is σ = 40906126192896. Its totient is φ = 7574769216960.

The previous prime is 20831219435219. The next prime is 20831219435293. The reversal of 20831219435290 is 9253491213802.

It is a super-2 number, since 2×20831219435290² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20831219435293) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1088824 + ... + 6545836.

It is an arithmetic number, because the mean of its divisors is an integer number (1278316443528).

Almost surely, 2^{20831219435290} is an apocalyptic number.

20831219435290 is a deficient number, since it is larger than the sum of its proper divisors (20074906757606).

20831219435290 is a wasteful number, since it uses less digits than its factorization.

20831219435290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5491734.

The product of its (nonzero) digits is 933120, while the sum is 49.

The spelling of 20831219435290 in words is "twenty trillion, eight hundred thirty-one billion, two hundred nineteen million, four hundred thirty-five thousand, two hundred ninety".