20148987740 has 48 divisors (see below), whose sum is σ = 49269995712. Its totient is φ = 6777878016.

The previous prime is 20148987721. The next prime is 20148987797. The reversal of 20148987740 is 4778984102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1350329 + ... + 1365168.

It is an arithmetic number, because the mean of its divisors is an integer number (1026458244).

Almost surely, 2^20148987740 is an apocalyptic number.

20148987740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20148987740 is an abundant number, since it is smaller than the sum of its proper divisors (29121007972).

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

20148987740 is a wasteful number, since it uses less digits than its factorization.

20148987740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2715566 (or 2715564 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 50.

The spelling of 20148987740 in words is "twenty billion, one hundred forty-eight million, nine hundred eighty-seven thousand, seven hundred forty".