20154156452 has 6 divisors (see below), whose sum is σ = 35269773798. Its totient is φ = 10077078224.

The previous prime is 20154156413. The next prime is 20154156461. The reversal of 20154156452 is 25465145102.

It can be written as a sum of positive squares in only one way, i.e., 17866064896 + 2288091556 = 133664^2 + 47834^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2519269553 + ... + 2519269560.

It is an arithmetic number, because the mean of its divisors is an integer number (5878295633).

Almost surely, 2^20154156452 is an apocalyptic number.

It is an amenable number.

20154156452 is a deficient number, since it is larger than the sum of its proper divisors (15115617346).

20154156452 is a wasteful number, since it uses less digits than its factorization.

20154156452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5038539117 (or 5038539115 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 35.

The spelling of 20154156452 in words is "twenty billion, one hundred fifty-four million, one hundred fifty-six thousand, four hundred fifty-two".