20190492740 has 24 divisors (see below), whose sum is σ = 46254583872. Its totient is φ = 7341997280.

The previous prime is 20190492733. The next prime is 20190492827. The reversal of 20190492740 is 4729409102.

It is a junction number, because it is equal to n+sod(n) for n = 20190492694 and 20190492703.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45887264 + ... + 45887703.

It is an arithmetic number, because the mean of its divisors is an integer number (1927274328).

Almost surely, 2^20190492740 is an apocalyptic number.

20190492740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20190492740 is an abundant number, since it is smaller than the sum of its proper divisors (26064091132).

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

20190492740 is a wasteful number, since it uses less digits than its factorization.

20190492740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91774987 (or 91774985 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 20190492740 in words is "twenty billion, one hundred ninety million, four hundred ninety-two thousand, seven hundred forty".