20340036542 has 32 divisors (see below), whose sum is σ = 35652718080. Its totient is φ = 8522851680.

The previous prime is 20340036539. The next prime is 20340036547. The reversal of 20340036542 is 24563004302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20340036547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71309 + ... + 213927.

It is an arithmetic number, because the mean of its divisors is an integer number (1114147440).

Almost surely, 2^20340036542 is an apocalyptic number.

It is a pronic number, being equal to 142618×142619.

20340036542 is a deficient number, since it is larger than the sum of its proper divisors (15312681538).

20340036542 is a wasteful number, since it uses less digits than its factorization.

20340036542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142856.

The product of its (nonzero) digits is 17280, while the sum is 29.

The spelling of 20340036542 in words is "twenty billion, three hundred forty million, thirty-six thousand, five hundred forty-two".