20342686842 has 40 divisors (see below), whose sum is σ = 46025275296. Its totient is φ = 6715056168.

The previous prime is 20342686831. The next prime is 20342686891. The reversal of 20342686842 is 24868624302.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 592888 + ... + 626259.

Almost surely, 2^20342686842 is an apocalyptic number.

20342686842 is an abundant number, since it is smaller than the sum of its proper divisors (25682588454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20342686842 is a wasteful number, since it uses less digits than its factorization.

20342686842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219264 (or 1219255 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 45.

The spelling of 20342686842 in words is "twenty billion, three hundred forty-two million, six hundred eighty-six thousand, eight hundred forty-two".