20051555203412 has 6 divisors (see below), whose sum is σ = 35090221605978. Its totient is φ = 10025777601704.

The previous prime is 20051555203391. The next prime is 20051555203543. The reversal of 20051555203412 is 21430255515002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12062034625936 + 7989520577476 = 3473044^2 + 2826574^2 .

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 as a sum of consecutive naturals, namely, 2506444400423 + ... + 2506444400430.

It is an arithmetic number, because the mean of its divisors is an integer number (5848370267663).

Almost surely, 2^{20051555203412} is an apocalyptic number.

It is an amenable number.

20051555203412 is a deficient number, since it is larger than the sum of its proper divisors (15038666402566).

20051555203412 is a wasteful number, since it uses less digits than its factorization.

20051555203412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5012888800857 (or 5012888800855 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 35.

The spelling of 20051555203412 in words is "twenty trillion, fifty-one billion, five hundred fifty-five million, two hundred three thousand, four hundred twelve".