15420420134344 has 8 divisors (see below), whose sum is σ = 28913287751910. Its totient is φ = 7710210067168.

The previous prime is 15420420134299. The next prime is 15420420134369. The reversal of 15420420134344 is 44343102402451.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15020755938244 + 399664196100 = 3875662^2 + 632190^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 963776258389 + ... + 963776258404.

Almost surely, 2^{15420420134344} is an apocalyptic number.

It is an amenable number.

15420420134344 is a deficient number, since it is larger than the sum of its proper divisors (13492867617566).

15420420134344 is a wasteful number, since it uses less digits than its factorization.

15420420134344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927552516799 (or 1927552516795 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 37.

Adding to 15420420134344 its reverse (44343102402451), we get a palindrome (59763522536795).

The spelling of 15420420134344 in words is "fifteen trillion, four hundred twenty billion, four hundred twenty million, one hundred thirty-four thousand, three hundred forty-four".