20144929531 has 8 divisors (see below), whose sum is σ = 21207918800. Its totient is φ = 19082213280.

The previous prime is 20144929529. The next prime is 20144929537. The reversal of 20144929531 is 13592944102.

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

It is a cyclic number.

It is not a de Polignac number, because 20144929531 - 2¹ = 20144929529 is a prime.

It is a super-2 number, since 2×20144929531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20144929537) 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, 93001 + ... + 221221.

It is an arithmetic number, because the mean of its divisors is an integer number (2650989850).

Almost surely, 2^20144929531 is an apocalyptic number.

20144929531 is a deficient number, since it is larger than the sum of its proper divisors (1062989269).

20144929531 is a wasteful number, since it uses less digits than its factorization.

20144929531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136509.

The product of its (nonzero) digits is 77760, while the sum is 40.

The spelling of 20144929531 in words is "twenty billion, one hundred forty-four million, nine hundred twenty-nine thousand, five hundred thirty-one".