20151744330 has 64 divisors (see below), whose sum is σ = 48599066880. Its totient is φ = 5347769856.

The previous prime is 20151744329. The next prime is 20151744367. The reversal of 20151744330 is 3344715102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5868294 + ... + 5871726.

It is an arithmetic number, because the mean of its divisors is an integer number (759360420).

Almost surely, 2^20151744330 is an apocalyptic number.

20151744330 is an abundant number, since it is smaller than the sum of its proper divisors (28447322550).

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

20151744330 is a wasteful number, since it uses less digits than its factorization.

20151744330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4335.

The product of its (nonzero) digits is 10080, while the sum is 30.

The spelling of 20151744330 in words is "twenty billion, one hundred fifty-one million, seven hundred forty-four thousand, three hundred thirty".