30006815542138 has 16 divisors (see below), whose sum is σ = 47106558083520. Its totient is φ = 14308500862656.

The previous prime is 30006815542127. The next prime is 30006815542139. The reversal of 30006815542138 is 83124551860003.

It is a super-2 number, since 2×30006815542138² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (30006815542139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 967821408 + ... + 967852411.

It is an arithmetic number, because the mean of its divisors is an integer number (2944159880220).

Almost surely, 2^{30006815542138} is an apocalyptic number.

30006815542138 is a deficient number, since it is larger than the sum of its proper divisors (17099742541382).

30006815542138 is a wasteful number, since it uses less digits than its factorization.

30006815542138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1935674181.

The product of its (nonzero) digits is 691200, while the sum is 46.

The spelling of 30006815542138 in words is "thirty trillion, six billion, eight hundred fifteen million, five hundred forty-two thousand, one hundred thirty-eight".