20151523064 has 16 divisors (see below), whose sum is σ = 37785753720. Its totient is φ = 10075322080.

The previous prime is 20151523043. The next prime is 20151523069. The reversal of 20151523064 is 46032515102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20151523069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222194 + ... + 299454.

Almost surely, 2^20151523064 is an apocalyptic number.

It is an amenable number.

20151523064 is a deficient number, since it is larger than the sum of its proper divisors (17634230656).

20151523064 is a wasteful number, since it uses less digits than its factorization.

20151523064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109870 (or 109866 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The spelling of 20151523064 in words is "twenty billion, one hundred fifty-one million, five hundred twenty-three thousand, sixty-four".