20153278464 has 224 divisors, whose sum is σ = 59186405376. Its totient is φ = 6048645120.

The previous prime is 20153278463. The next prime is 20153278493. The reversal of 20153278464 is 46487235102.

It is not an unprimeable number, because it can be changed into a prime (20153278463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34332379 + ... + 34332965.

It is an arithmetic number, because the mean of its divisors is an integer number (264225024).

Almost surely, 2^20153278464 is an apocalyptic number.

20153278464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20153278464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29593202688).

20153278464 is an abundant number, since it is smaller than the sum of its proper divisors (39033126912).

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

20153278464 is a wasteful number, since it uses less digits than its factorization.

20153278464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754 (or 730 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The spelling of 20153278464 in words is "twenty billion, one hundred fifty-three million, two hundred seventy-eight thousand, four hundred sixty-four".