20154336040 has 32 divisors (see below), whose sum is σ = 47318878080. Its totient is φ = 7711223872.

The previous prime is 20154336031. The next prime is 20154336047. The reversal of 20154336040 is 4063345102.

It is a super-2 number, since 2×20154336040² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20154336047) 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, 10952524 + ... + 10954363.

It is an arithmetic number, because the mean of its divisors is an integer number (1478714940).

Almost surely, 2^20154336040 is an apocalyptic number.

20154336040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20154336040 is an abundant number, since it is smaller than the sum of its proper divisors (27164542040).

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

20154336040 is a wasteful number, since it uses less digits than its factorization.

20154336040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21906921 (or 21906917 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The spelling of 20154336040 in words is "twenty billion, one hundred fifty-four million, three hundred thirty-six thousand, forty".