20152155544 has 8 divisors (see below), whose sum is σ = 37785291660. Its totient is φ = 10076077768.

The previous prime is 20152155469. The next prime is 20152155553. The reversal of 20152155544 is 44555125102.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×20152155544² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1259509714 + ... + 1259509729.

Almost surely, 2^20152155544 is an apocalyptic number.

It is an amenable number.

20152155544 is a deficient number, since it is larger than the sum of its proper divisors (17633136116).

20152155544 is a wasteful number, since it uses less digits than its factorization.

20152155544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2519019449 (or 2519019445 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 34.

The spelling of 20152155544 in words is "twenty billion, one hundred fifty-two million, one hundred fifty-five thousand, five hundred forty-four".