20151640354 has 8 divisors (see below), whose sum is σ = 30240967680. Its totient is φ = 10071317796.

The previous prime is 20151640349. The next prime is 20151640363. The reversal of 20151640354 is 45304615102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20151640354² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2245594 + ... + 2254549.

It is an arithmetic number, because the mean of its divisors is an integer number (3780120960).

Almost surely, 2^20151640354 is an apocalyptic number.

20151640354 is a deficient number, since it is larger than the sum of its proper divisors (10089327326).

20151640354 is a wasteful number, since it uses less digits than its factorization.

20151640354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4502384.

The product of its (nonzero) digits is 14400, while the sum is 31.

The spelling of 20151640354 in words is "twenty billion, one hundred fifty-one million, six hundred forty thousand, three hundred fifty-four".